C.G.
My advice to you is don't rush her. My daughter went back and forth with potty training from 18 months to 2 1/2 and we dealt with accidents for about 6 months, but I think the bottom line is your daughter will train when she's ready. She is only just turning 2. Most kids don't train that early, and while she seems on the right path, don't be surprised if it takes 6 more months (or more) for her to really get it. Be proud of how far she has come already! It sounds like you are doing everything you can to give her the opportunity to use the potty (maybe take the batteries out of the musical potty chair - or get one that goes on the toilet - my daughter seemed to like the big toilet more than her potty chair). And I think she will surprise you one day and be accident free! Just remember to keep putting her on every hour or when you think she should have to go and she'll get it.
Good luck!