Ok, to answer your questions
1 - Most formula fed babies move to 3 bottles around 10 months, the usual pattern is a wake up bottle, a bottle after lunch just before the afternoon nap and a bedtime bottle. You then drop to 2 bottles/ drinks of milk around 12 months.
2 - No, I don't think you should drop a milk feed! The bottle routine looks fine to me, he needs about 24oz of milk a day to gt his needs met and on your current routine he's about getting this.
3 - You could think about dropping the nightfeed around now. We weaned my DD off the NF about 8 months once she was taking a decent amount of milk and solids in the day. We reduced the feed by 1oz every 3 nights and when it got down to an oz or so we just offered a sip of water. After the third night of only being offered water she stopped waking.
HTH!
Laura