Sorry!!!! Hugs to you. I too have a spirited DS and it is a long road with him, that's for sure (he is 10.5 months now). Have you beed doing BW the entire time you have been sleep training him? Are you breast feeding or bottle feeding. My DS still wakes up several times throughout the night but we have been able to cut the night feedings out (he was eating 3 times a night until about a month ago) and he still fusses but we can just go in, lay him back down and pat his little butt for aminute or two and he is back asleep. We had 3 or 4 rought nights of PU/PD though. When you get a chance please give more info.
Hang in there!!