I agree with all of the above. I can't help but wonder, tho, if the batting was folded when you used it. I made this mistake (at least) once. It can be difficult to tell! (Sometimes I feel like I'm peeling apart something I shouldn't.)
Some people - including my husband - hugely prefer a lofty quilt! (In fact, he's rejected my homemade quilts using flat batting in favor of a store-bought quilt for exactly this reason.)