2. Sitting down just because the priest sat down after Communion
Maybe you should be sitting down when the priest sits, but his sitting is not the reason for your sitting. The priest can sit whenever he wants (almost), but we don’t take cues from him. Nobody should sit until the Host has been returned to the tabernacle. If the tabernacle is not in view, then everyone ought to be waiting until the ciborium has left the sanctuary.
Informative and good. Congratulations for the various articles/prayers. God bless.