Browser: Chrome v. 23.0.1271.97 m

Issue: During any session, after adding my first card to inventory, the Date Added column disappears.

Note: If I change the sort to use date (most recent first) before going into the Import > Cards, the column still disappears after adding the first card, but the sort order stays correct.

A similar thing happens with the Edition column in the Card Database.

For instance, I loaded up a list of all the RTR rares, so that I could verify/update some counts from my binder. If I click on and edit the inventory values for a card in that view then the page will auto-refresh and the Edition column disappears. Even if you go look at the Columns dropdown list the Edition column is no longer selected.