It sounds like you are finding a routine that is starting to work for you. My only suggestion is maybe adjusting the time back. I know from reading other baby books and personal experience that although the routine itself usually works for a great number of people. Sometimes the timing doesn't, depending on work schedules and such.
My suggestion would be to try the routine as you did the other night but instead of 6 pm try 8 pm as the start time. It may give you more actual sleep time at night for you.
Also, for the middle of the night wakeup, you might want to try a nighttime diaper. I know Huggies makes some. They are more absorbent and hold more. She may be waking more from the diaper being so full and wet against her. With the Huggies, the wet diaper may not wake her at that point and she may sleep a little longer.
Also, if she is going to have that bottle in the middle of the night. Change the diaper before the bottle not after. The bottle usually calms them back down. And make sure you do all of this in a room with very minimal lighting. Get a low wattage light bulb for the lamp in your or her bedroom. Do the diaper change and the bottle with the low wattage bulb on. The bright light can also stimulate and wake them. So sometimes if you use one that is just barely light enough for you to see what you are doing, they are less stimulated and less wakened by your ministrations.
Anyhow, these are just a few suggestions. Please feel free to take them or ignore them. I know the low lighting has worked with all three of my children. The Cry Out Method did NOT work with any of them. They would all cry until they vomited. I was told by a well meaning soul that I needed to clean it up and then do it again. One time of cleaning up vomit all night was more than enough. My 8 year old goes to bed on her own without any problems. She has been on a set schedule for years and is a good sleeper. Her younger brother, who is three, likes to try and stall at night. He wants to get into our bed but we are holding strong and he is doing really well overall. He has been on a schedule but we are trying to adjust it back. (He goes to bed after his sister since she has to be up for school. We didn't want him to keep her up.) Our almost 9 month old son doesn't give me any problems going to sleep. He likes to go to sleep at between 10 and 11 pm and sleeps usually until between 9 and 10 am.
Good luck with your little girl and fitting work into your day. I know how rought that can sometimes be.