H.L.
I am not sure what time she wakes up for her feeding but if you could have her wait until 3 or 4 AM and then feed her she would probably sleep while you got ready to go to work. I had my husband go in and give our baby(9 months) a sippy cup with water when he woke around midnight. He cried, but after a week he no longer wakes up for the midnight feeding. He does wake at 4 or 5 AM and I feed him and then put him back in his crib and he sleeps until 7 or 8. About the sitting up issue I had the same problem. I would just lay him down after he sat up and tell him to go "night night". He would sit back up and so I just let him sit up. After about a week of me having him lay down he began doing it himself. Hang in there...it will get better! I have a 4 year old who doesn't want to get up in the morning! :)