urbanrealtor – Thanks for the insight to what happened. On SDLookup.com it shows the listing as “Removed from Market” (as opposed to “Expired” which would more accurate) and then as a “New Listing” (as opposed to “Renewed Listing”).
In my opinion the MLS should not reset the DOM on listings that expire and are subsequently relisted. It would provide a more accurate picture to buyers and a greater sense of transparency.