(((hugs))) hun. I know he had a 4.30am NW this morning, BUT really great that he went back to sleep til 6.45am!
Provided he is eating well during the day, he shouldn't technically *need* any feeds at night at this age, so it could be habitual, but I think tbh - if it puts him back to sleep at the EW I'd probably continue!
Nothing whatsoever would put my DS back to sleep when he EW, not bottle, not cuddles, not rocking, not cosleeping & believe me we tried them all!
WRT the repeated NW's this may just be him transitioning between sleep cycles, or it may be b/c he is a tad OT. I certainly found with my LO, that if he is OT we get little cry-outs like that. I also found that if the bulk of his day sleep was early in the AM then he would often be OT by BT & this is what we'd get. And of course, OT can be one of the biggest causes of EW.
I think if you keep very gradually pushing that AM nap a bit later, it really should help. xx