Ok scheduling guru's -

I was rerouted into an x day, my new release time was 2100 on said x day. The way I read the contract I don't start my next x day until 9 hours after my release, so that would be 0600 the following morning. Therefore, I should have one full PB day and then a partial PB, so that my next reserve day will begin ot 0600 on the partial PB day. Correct? (I hope that makes sense)