I've got a similar problem.

I had the flag "Automatically add games to the tracking list" on. Yesterday I tried to remove it because I wanted to manually choose what to do with the "add" button and now there are no more flags in my preferences, but the website still keeps adding the games to the "tracking" list.

Each time I press "add game" I have to manually remove it from the "tracking list". This is annoying when I just want to add some games to my "collection" or "now playing" lists.