Hi there, I have locked the post in NW so we can keep all advice in one place for you here on General Sleep.
11 hours STTN is fine, a lot of LO's only ever do 11.
With the refusing bottle, diarrhea, and restless naps it sounds like teething to me...any chance?
So his 1 hr 10 naps could be UT but he's having a hard time with the A times because he's not feeling grand due to teeth.
1 hr 10 naps are not the worst but too many of these shaved naps consecutively cause issues with OT.