I see this a lot! Allot means to parcel out something such as to allot a piece of land. "A lot" means frequently or often. Sometimes people use "alot" but there is no such word. It is two words: a lot. I think I am just going to start using the slang word "lots"

as in "gimmie lots of hugs" -- because I have never liked the use of words a lot, allot, or alot.

Yeah, it's a pet peeve I should get over it, I know. Do you have a pet peeve about something you see lots online? (Besides irritation at someone who points out spelling errors.)