HELP!!-Oil Leak......

The adaptor takes place of the block plate. There are gaskets for the plate, and the retaining nut/oil filter stud thingy, RTV should NOT be used here. Oil pressure will force it out of where ever it's put, and make a big mess. RTV seals splashed oil ok, but not pressurized oil. If you cant sand it flat by hand, replace the plate. The damage was most likely done trying to remove it from the block the first time.