Wondering if someone could please help us . . . our little man is now 8.5mths and has done a couple of sleep throughs, but nothing consistant. He has been through the wars lately and has this hidious cough still, and seems to have sniffles 24/7 (all seemed to start when he started at nursery

)
He is going off his solids too and we have to distract him with things to chew on and when he opens his mouth we'll give him some food. Have tried him on finger foods, but the only things that he doesn't seem to gag on is these corn snacks. He now has 6 teeth
Here's his routine
6:30am/7am Wake
7am Bottle, 180ml
8am Breakfast 90ml formula mixed with powdered cereal (he's gluten free for now)
9am/9:30am Nap for 1-1.5hrs
11am Bottle, 180ml
12pm Lunch Offer meat and veg or just mixed veg, then offer fruit puree or yoghurt for dessert
1pm/1:30pm Nap 1-1.5hrs
After nap Bottle, 180ml
4pmish Offer juice and some snacks
5:45pm Dinner which is similar to lunch
Bedtime routine
6:30pm
Wakes anywhere between 2:30-4:30am for a bottle. We are trying to reduce this to 90ml
He doesn't seem to be finishing all of his bottles, but there is no consistancy on when he does/doesn't. He is also at nursery for two half days each week, and when he is there he rarely touches his bottle, but eats well for lunch.
Questions
Should I reduce his bottles to say 150ml ?
Do you think his feeds are well spaced during the day ?
He is still in our room and I have been telling my hubby we should move into the back room ASAP, but he doesn't see the point until he learns to sleep through - what do you think ?
He seems to be teething 24/7 but it's hard to get your fingers into his mouth to put on any teething gel - any suggestions ? He'll chew on anything he can lay his hands on though

He has had quite a few milestones of late : can sit himself up from lying down, is crawling and is now pulling himself up into a standing position - is this affecting everything ?
When do they start to sleep through ?
Any advice is very much appreciated, and I know that every bub is different, but it would be nice to get some feedback and some ideas !!! We're still writing our baby manual as our little man didn't come with one
Thanks heaps guys
Cherie