Hey J.,
I can't offer much advise, but I can tell you that my son is 9 months old and does wake up 2 to 3 times per night between 10:30 PM and 7:30 AM. He sweats alot while he is sleeping so I think he gets really thristy at night. Also, when people generally start working with the baby to sleep through the night is when my child started getting sick. He started getting sick around 5 months and has had something for months now. Colds, stomach viruses, bronchitus, you name it. He is now 9 months old and has had an ear infection for 4 weeks. Also, he is almost 24 pounds so he's had a lot of growth spurts.
I don't know if any of this would apply to your daughter, but these are my experiences. Different babies have different levels of tolerence when their bodies go through the light sleep stage. If this is the case, I would try a sound machine. I bought one at Walmart for about $20. It makes rainforest, ocean, rainstorm, and other different noises. This might be helpful to ease her through the light sleep stages at night.
If you find any ideas of making the passy easier to find at night, let me know!! That thing drives me crazy! No wonder he can't find it...I can barely find it at 3 in the morning!