Micro, the 10:00-10:00 fits within FAA rules. Other airlines typically have the "in domicle" or "calendar day" written into their contract, but just a 24 hour off period is all that is required.

Otherwise these trips would have to be rebuilt to fly back to MEM, to satisfy the 1-in-7 requirement...

A300, Trip 187/21SEP
727, Trip 292/07SEP