The people having problems loosing apps2sd... I've had this problem before using mason .15 kernel also. Originally had the problem on CM, switched to a different kernel, and the problem went away. I had the problem again when I flashed the original version of this. When I flashed the update I chose the mason .15 sbc fso kernel, and have not had the issue.
I was using go launcher at the time. Problem is, go launcher is installed to data partition (ie sd-ext), so it disappears also. Edit, since I just saw your comment about davlic-cache, I always run that from the phone, never from sd-ext.
Anyway, the fix I had was just to flash it again (only wiped cache/davlic-cache) and chose the mason .15 sbc-fso, and the problem has disappeared...