as far as the focus is concerned you could focus at somehting very far away during the day using the AF, then switch the camera to MF before taking any more hots. the camera focus should remain at infinity (or close to) and take a test shot or two, blow it up on the lcd or download it and tweak the manual focus ring ever so slightly.
in saying that usually most cameras do an ok job of focusing on the moon, did you handhold or have on tripod.
as for the 2nd part most don't use d-slr fr shots thru a reflector - most ota's don't have the right amount of travel focus and quite often you need to move the mirror further up the tube closer to the focuser. hence most use a webcam or ccd for reflectors to take luna/planet shots
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