Hi there, sorry you haven't gotten a reply yet!

It could be a few different things, I guess. Possibly the 2yr molars are starting to move, and she's maybe had some discomfort from the ear infections. But, I think it might be worth a routine tweak if the early wakings are happening frequently (most days of the week).
I think you have a couple different options. The first would be moving the nap back to 1pm. You can still let her sleep for 2hr, if you'd like. If you keep the 2hr nap, BT may move a bit as well, to 7:30/8 or may be fine staying there (it's different for different kids). You could also move the nap to 1pm and cut it to 1.5hr and keep the 7pm BT.
When did she move to one nap? Do you think she's pretty average in her sleep needs?