James didn't take well to solids until 8/9 months so at T's age he had the DF and a NF still. We didn't get rid of either until 10 months when we dropped the DF -- he managed to drop the NF on his own about a month later and started sleeping through around 11 months. His wakings were fairly random as well and he generally went straight back to sleep so I wasn't messing with it. I know T is bottle fed so maybe different there, but I also know you're worried about his intake overall, so as long as he's going back to sleep, I would just keep feeding if it were me. I feel like the reassurance that he's getting fed is going to help you sleep better, yk? If you want to try to discourage the night feeds long term, you could always keep those bottles smaller than the daytime ones if you think he'd still go back to sleep.