I think this is one of those rare cases where the default for an attribute for new files is wrongly set.
Of course, whichever way any default is set, there’ll always be occasions when you wish it was the other way round, but I would have thought that the proportion of ‘normal’ notes is so much greater than ‘composed notes’ that it would be better to have the combining feature turned off, rather than on. It’s irritating (and confusing the first few times it happens) to have notes glue to each other in Map view when you don’t want them to.
Of course once you know what’s happening, there are workarounds, but shouldn’t defaults be set to the most common option? How many people always start off files with composite notes as the main feature? (That’s a genuine question, by the way…) Shouldn’t setting a composite be a deliberate decision, not the accidental result of clumsy mousing?
Yes, I know this is a minor point…