You're being facetious and ignoring my point. Seasons 2 and 3 were anthology, but season 1 wasn't. Season 1 was completely different, for starters they were all characters in heaven, while 2 and 3 were just people on earth. Hell, even the IMDB description only covers season 1:

A comedy set in the offices of Heaven Inc. When God plans to destroy the Earth, two low-level angels must convince their boss to save humanity. They bet him they can pull off their most impossible miracle yet: help two humans fall in love.

They ran out of material at the end of season 1 and recycled the show into something else. Now, it's an anthology show, but it was never intended to be that at the outset.