My point was if your moored up and a space appears between boats in the evening why not move up and close the gaps before you settle down?
Its not hard is it and something i always do if i find the mooring is full or filling up, You shouldn't have to ask is called good manners.
The other point was the boats i passed on the way up were still in the overnight moorings the following evening taking up space that they should have left earlier that day.
So that would have been 2 nights at least (may have been longer) where they should have only been there one night.