OP used Travelocity (see URL), but can also be found with Google Flights. Note the requirements. 7-day min stay makes it more of a good deal fare, than a pure MR.
OUTBOUND - PERMITTED MON THROUGH THU. INBOUND - PERMITTED SUN THROUGH WED ON THE FIRST INTERNATIONAL SECTOR.
RESERVATIONS FOR ALL SECTORS ARE REQUIRED AT LEAST 30 DAYS BEFORE DEPARTURE.
TRAVEL FROM INBOUND TRANSATLANTIC SECTOR MUST COMMENCE NO EARLIER THAN 7 DAYS AFTER DEPARTURE OF THE OUTBOUND TRANSATLANTIC SECTOR.
TICKETS MUST BE ISSUED ON/BEFORE 17JUL 18.