I can reproduce this *when* software-center-agent finishes exactly during the install of 2vcard
1. ensure "2vcard" is not installed
2. run software-center search:2vcard
3. click on "install"
4. wait for it to finish and notice that the listview screen is not updated and there is no "installed" emblem the button still says "install"
edubuntu usb live. italian version. I install CompizConfig Settings Manager. After a few minutes the screen appearence is the one shown in the first screen shot. When the installation ends, the situation is the one shown in the second screen-shot. I open CompizConfig Settings Manager and it works fine. I click on CompizConfig Settings Manager in software center windows and it seems not installed as you can see from the third screen-shot. I press install and the installation starts again. After a few minutes the Install button is converted into the Remove one.
DistroRelease: Ubuntu 12.04
Package: software-center 5.2
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
Date: Thu Apr 19 18:48:30 2012
LiveMediaBuild: Edubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120419.1)
PATH=(custom, no user)
UpgradeStatus: No upgrade log present (probably fresh install)