The list of real entries are (at that time, it's dynamic):

Track    Arch    Channel                                  Version    Revision    Expires at
latest   all     stable                                   0.1        124
                 candidate                                ^          ^
                 beta                                     ^          ^
                 edge                                     0.1        170
                 edge/gnome-shell-communitheme-pr125      0.1        112         2018-05-26T13:54:16.742243
                 edge/gnome-shell-communitheme-pr128      0.1        144         2018-05-29T22:59:41.400161
                 edge/gnome-shell-communitheme-pr130      0.1        108         2018-05-26T09:21:19.157622
                 edge/gnome-shell-communitheme-pr131      0.1        125         2018-05-27T12:05:18.882819
                 edge/gnome-shell-communitheme-pr136      0.1        132         2018-05-27T21:09:57.216625
                 edge/gtk-communitheme-pr371              0.1        123         2018-05-27T10:43:32.369778
                 edge/gtk-communitheme-pr374              0.1        128         2018-05-27T16:17:18.898120
                 edge/gnome-shell-communitheme-pr143      0.1        136         2018-05-28T08:51:24.786638
                 edge/gtk-communitheme-pr384              0.1        159         2018-05-31T08:48:58.912739
                 edge/gtk-communitheme-pr385              0.1        164         2018-05-31T22:17:13.052878
                 edge/gtk-communitheme-pr387              0.1        146         2018-05-30T09:35:43.783124
                 edge/gnome-shell-communitheme-pr149      0.1        148         2018-05-30T14:05:02.010329
                 edge/gnome-shell-communitheme-pr150      0.1        150         2018-05-30T16:23:04.423498
                 edge/gnome-shell-communitheme-pr151      0.1        155         2018-05-30T22:11:56.694347
                 edge/communitheme-snap-helpers-pr9       0.1        156         2018-05-30T22:49:43.618408
                 edge/gnome-shell-communitheme-pr158      0.1        160         2018-05-31T16:11:35.365221
                 edge/gtk-communitheme-pr392              0.1        167         2018-06-01T14:24:25.782118
                 edge/gtk-communitheme-pr393              0.1        168         2018-06-01T14:46:23.289516
                 edge/gtk-communitheme-pr394              0.1        169         2018-06-01T14:46:53.708757
         amd64   stable                                   0.1        97
                 candidate                                ^          ^
                 beta                                     ^          ^
                 edge                                     0.1        104
                 edge/ubuntu-communitheme-snap-helpers-1  0.1        4           2018-05-04T10:05:45.478718
                 edge/communitheme-snap-helpers-pr1       0.1        29          2018-05-05T09:31:00.421780
                 edge/blablab-branch-pr1                  0.1        10          2018-05-04T14:44:43.359591
                 edge/communitheme-snap-helpers-pr2       0.1        35          2018-05-09T15:05:08.609020
                 edge/communitheme-sounds-pr5             0.1        38          2018-05-10T08:46:42.989211
                 edge/cursor-communitheme-pr1             0.1        39          2018-05-10T08:50:04.794461
                 edge/gtk-communitheme-pr321              0.1        40          2018-05-10T08:52:08.630168
                 edge/test-gtk2                           0.1        45          2018-05-11T08:52:14.866723
                 edge/communitheme-snap-helpers-pr3       0.1        46          2018-05-11T09:02:37.264041
                 edge/communitheme-snap-helpers-pr4       0.1        64          2018-05-13T13:25:53.288391
                 edge/communitheme-snap-helpers-pr6       0.1        66          2018-05-16T09:40:08.990495
                 edge/communitheme-snap-helpers-pr7       0.1        68          2018-05-20T07:42:54.143890
                 edge/gnome-shell-communitheme-pr122      0.1        72          2018-05-21T20:17:17.099928
                 edge/gnome-shell-communitheme-pr123      0.1        81          2018-05-23T19:43:13.058809
                 edge/gnome-shell-communitheme-pr125      0.1        105         2018-05-26T13:54:16.742243
                 edge/gnome-shell-communitheme-pr126      0.1        80          2018-05-23T18:30:45.643229
                 edge/gtk-communitheme-pr360              0.1        86          2018-05-24T18:07:42.761720
                 edge/gnome-shell-communitheme-pr127      0.1        88          2018-05-24T21:20:07.959559
                 edge/gtk-communitheme-pr361              0.1        89          2018-05-24T21:21:29.565369
                 edge/gnome-shell-communitheme-pr128      0.1        103         2018-05-29T22:59:41.400161
                 edge/communitheme-snap-helpers-pr8       0.1        91          2018-05-25T06:53:48.098997
                 edge/gtk-communitheme-pr359              0.1        100         2018-05-25T16:19:17.179113

This was collected via snapcraft status communitheme (as part of snap author creds). I don't know of any snap command giving you this info.

Note that snapcraft doesn't deduplicate between arch: amd64 and arch: all (because we switched recently to arch: all).
However, there isn't repetition of edge/communitheme-snap-helpers-pr4 contrary to the screenshot.