Am I missing something? The quote was different to the OP, and the OP doesn't exactly make full sense to me.
I would love to help out, but I don't know how since I don't know what you need help with.
When using the Clipboard to paste a Component building, you shouldn't just instantly press LT. Check where the bottom of the building is (ground layer) and place this on your appropriate ground level. If done correctly, your building shouldn't be flying or making the ground uneven.