I have seen that before too.  There are those that use the QCD to transfer between the Landcontract parties but normally there are no notations like the following example -  "this QCD or WD  settles or completes the landcontract as recorded in ...."  on the deed itself.  That is where the real trouble lies.  WD or not there probably should have been a notation of what the full intent of the deed was - I think the same should be done in cases of divorce.  Too bad too because here I would most likely as the title agent have to contact the other party and have them sign an affidavit or something that all parties agree the QCD deed was done in lieu of the WD and that all items have been satisfied, etc, etc, and then file a copy of the land contract along with the affidavit because in OH people never think to record the land contract.  had many many deals blow up in my face when the "buyers" lender finds out there was an unrecorded LC.

It is a total pain in the rump but it is better to cover thy rump then be called years later with a claim because you were too busy to make a few calls and have an affidavit done in support.