*Pin Issue! Help!*

My pins just went berserk...the last 6 pin slots all say "Blank Pin," and I can't change them no matter what I do! I can remove my other pins, but when I do they become Blank Pins as well! So I've stopped experimenting for fear of losing all my pin slots!
As of right now, the only pin I can change is the 4th pin in the second row, and if I remove it, it'll become a blank pin like all the ones after it. So I'm not going to mess with them any more until it's fixed! Help please! This has never happened to me before.
can you drag and drop your pins into the slots?
YES! This helps me tremendously- thank you for mentioning!! Didn't even think of that :)