With regard to 11825 Westview Parkway, that sale does not show up at sdlookup.com or the county assessor’s property sales search. I suspect that’s the transfer to the lender.
Someone mentioned on some thread here, that those are a different kind of “sale” (trustee vs. trust deed?) and I’m starting to think that Zillow lists them along with ordinary sales. This certainly presents the possibility for confusion, however I’m guessing that appraiser’s do make different considerations for these types of transaction (i.e. they probably don’t affect comps in the same way).
I do know I’m starting to see more of these, so I would like to understand it better.