strange things at the SpongeBob showing?

has anyone had this happen to them at the theatre?: so today I saw SpongeBob and all was fine, there was about me and 10 others in the theatre, mostly families and kids, nothing strange there, until about 10 minutes before the movie was over, 2 older men (over 50 for sure) come in and sit and watch the movie in the front row, on their phones and once the movie ends, they are still there like they are watching to watch it again or something.

And the strangest thing of all: when I asked the employee, they said they never scanned tickets for SpongeBob for anyone else besides us already in there, specifically they never scanned tickets for 2 older gentlemen, and after the movie, I spoke to a mother who was in there and they were very confused by it too.