"Onto" as a preposition, "On to" if you're using it to mean "onwards and towards": I placed the ho onto the bed. I moved on to the next booty.
That's true. An Aggie would never even think to ask this. For the record: "onto" means putting something on the surface: "I'm putting paint onto this fence" "On to" is "going forward" or "toward": "I'm going on to the next..."