Does anybody ever submit both SAT and ACT scores when applying to schools?

I think the part about that I was a little confused on (and decided, what the heck, just send them both so never really investigated) was when some schools stated that you must send “All test scores”. I wasn’t sure if ONLY meant all sittings of the same test (i.e. all SAT scores) or if it meant truly ALL test scores (both ACT and SAT if both were taken).