I don't really have that problem. Money tends to pop out too the right, so if I tap rows in the right direction, it doesn't land in front of anything I haven't tapped already.
Collecting money from buildings. The big difference between how each game does it is this: in Tapped Out, if you pop money/XP/etc out of a building, and you want to pop the building next to it, the first tap on the nearby building will collect the popped money instead of popping the building you were trying to tap.
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