Radiator question

If you are filling it to the top of the radiator and don't have a recovery system on it pushing about a half a quart out is pretty much normal.
My car pushes out about that much when it gets good and warm, but recovers it from the tank when it cools down.

Water based coolants expand when hot so it has to go somewhere.
The recovery system won't solve your heating issues though, but it'll keep the radiator full instead of having an air pocket in the cooling system. (which like I said is normal for a non recovery type system)