If you are on reduced rest one night, you need compensatory rest the next night. It is based on the SCHEDULED block time in a 24 hour lookback period. Your MIN rest requirements will not change if you go over block. But you always need 8 hours reduced rest, or 9 hours if you fly over 9 hours SCHEDULED block within a 24 hour lookback. If you are on reduced rest, you need either 10, 11, or 12 hours of compensatory rest depending if you had a reduced rest period with <8, 8-9, or >9 hours of SCHEDULED block in the reduced rest period. Oh yeah, your compensatory rest must start within 24 hours of the reduced rest period. That crap took me 10 years to figure out. But now it will all change, and it will probably take me 20 years to figure out this new crap.
Hope that helps, but know your reduced rest stuff. Chances are, your newer schedulers may be unfamiliar, and the FAA takes this stuff real seriously. May be tough to explain a silly rest violation when interviewing at a legacy or wherever you may be trying to go.
Eric Pogo