Music doesn't sort tracks/track numbers correctly

[Shawn B.]

If I open Music and import my library - I just chose 1 album to test this - when I sort by the track #'s if I add the column, it doesn't sort them correctly. For example, my track listings are:
1
3
2
5
4
7
6
9
8
11
10
16
12
15
13
14
18
17
19
20

If I reverse the order it puts the track order like this:
20
18
19
16
17
14
15
12
13
10
11
5
9
6
8
7
3
4
2
1

I've verified the order of the tracks on the CD. I'm using the latest updates provided by elementary OS Freya Beta 1

[Robert Sliwinski (8-r)]

I'm affected, too, trying to sort files with correct and valid ID3-Tags.