Wow!! Lots of almost truths going on here.
Assuming that you have deviated:
1) If your scheduled backend D/H is cancelled---You're SOL. FDXLAG is correct. (If a crewmember has not deviated---only his pairing will be revised)
2) Same duty time scheduled D/H? If your operating flight arrives into your outbound D/H city late and does not meet the minimum turn time 1+30---Your pairing must be rebuilt to show a legal(1+30 turn) D/H.
3) If your operating flight arrives into your outbound D/H city late and does not give you required rest prior to your scheduled D/H---The pairing must be rebuilt to show a legal rest period prior to the new scheduled D/H.
3) If your rebuilt pairing is from the same city and the same day, you will be shown as a deviator on the new scheduled D/H. And, you can not un-deviate.