So in tonight's game Mike Napoli hit a ball to left field that was ruled a catch, but was actually dropped on the dive by Ackley. Papi was on first and retreated to the bag after Napoli was ruled out. Ackley threw the ball to Cano at second who eventually tagged the bag while John Farrell came out to challenge the call on the field that the ball was caught. After a review, the call was overturned and Napoli was awarded first while Papi was moved up to second.
Seattle's manager came out and then initiated his own challenge. Don and Eck assumed he was challenging that since Ackley had dropped the ball, Cano touching second was a force out of Papi who should have advanced. The umps never clarified what they were reviewing (they never do, so I'm not dining them for that) which leaves me confused. If the call on the field was out, and the call was overturned via replay, how could Seattle challenge the non-call on a force play at second there? If that's not what was being reviewed, what else could Seattle have been challenging?
What am I missing?