Yes, a lot of snowbirds are “dual” voters - they vote in their own home state, usually the northeast or north central states, and they also have residence in Florida so they vote there also.
I’m not saying that everybody’s doing it, but many are, and they’ve gotten away with it because states don’t generally check with one another. That might be OK for local elections, maybe even desirable in some ways (if you live somewhere for 5 months of the year, maybe you should have a say in local affairs). BUT, for any election involving federal office, one vote per legal adult US citizen. Period.
Must disagree with your opinion that people maybe should ever be able to vote in more than one place. My Socialist sister thinks that anyone/everyone should have a vote simply because they live here/there. Yes, she’s a loony Leftist who doesn’t care how her side wins, just as long as they win.
They may not actually know they voted. This is how the after-hours judge ordered late hours work in Democrat districts usually minority urban areas where no one would dare question the vote. Find out who has not voted after the doors are closed and have a ballot filling party. This came from insiders in Chicago and Detroit many years ago and I don’t see how that may have changed
Maybe a “local” and “federal” refrigeration. Fed registration is to only vote for the state where you are legally a resident of. I would imagine most snowbirds are legal FL residents as they live there for 6 months and 1 day for tax purposes.