Why backroll a smooth ceiling?
If the homeowner wanted texture on the ceiling then why not have the drywall guys do it?
I havent backrolled a ceiling since the 90's,in my experiance,taking a roller to a ceiling never works out well.
It looks to me that that particular ceiling had drywall issues before you started,I see a lot of that here in my part of California,not too many good drywall guys around for whatever reason.
But for ceilings I have found my best method for painting them is just to use a good paint thinned just enough to avoid tails,good tip for the same reason,and then just a nice even heavy coat,2 for raw drywall,sprayed from a distance of about 24'' evenly will do the trick every time.
If theres a bad texture job on a ceiling,nothing you do with paint is going to fix that.