Tonight during taraweeh prayer, I was praying outside of the Masjid with some other brothers because it was full inside. During the prayer, people would come and go, but I couldn't really see inside the Masjid as to how much space was available. A brother came out and told us there is plenty of space inside, and that we have to come in because our prayers wouldn't count...this is the part that I have concerns about.
1. Does this type of situation mean that the taraweeh prayer (or any prayer with these circumstances) is not accepted because we started our own rows unknowingly?
2. Also, what if one prays in a row, and people in your row leave, and nobody fills in the gaps. Does this prayer become nullified or deficient?