Did you switch devices before this happened. I've seen this before when someone switches from one device to another.
If you run an ad on the first device, the second device won't know about it and will still show as available since they were done on a different device. However once you run the ad and try to collect the rewards there is a secondary check for the timers done on the server.
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If you run an ad on the first device, the second device won't know about it and will still show as available since they were done on a different device. However once you run the ad and try to collect the rewards there is a secondary check for the timers done on the server.