A WebmasterWorld thread reported a bug a couple weeks ago with Google AdWords. Typically, when you log into your AdWords advertiser console and you adjust the columns to sort by a specific column, those changes would be remembered. That is no longer sticking.
Keep reverting to cost, with zero cost ad campaigns at the top. Normally when you change the column sorting, Google remembers.
Mine keeps going back to AVG CPC in ascending order. I keep changing it back to AVG CPC descending order but it won't remember it.
This bug has been lingering on for a couple weeks with no word from Google on this. AdWords advertisers seem extremely frustrated and upset with this bug.
It's still happening. Annoyed
Forum discussion at WebmasterWorld.