Actually, now that you mention it, I did have that problem on GB. It was very annoying because I would start putting in the number I wanted to call without paying attention and then wonder why my call would not complete or I would call someone else. There were a lot of "Sorry, I wasn't trying to call you" moments. It was a pain having to remember to clear out the previous call.
It seems that clearing data and cache would fix it. That was going to be my suggestion. Maybe you have some settings/data that are remnants from GB. If you did an FDR, did you use a backup program to restore settings? Did you restore system settings after an fdr? That may cause remnants of old setting/data showing themselves. But just speculating here.
