JD,
It's so refreshing to read when someone does their homework before they bring home a new snake, and not just impulse buy.
Sounds like she's getting settled in nicely and from what you've written, you did everything right.
One quick question, what are you using to measure your temps and humidity in her enclosure.
How many holes do you have in her tub? Seems odd to me that two of the mice died in the tub. But mice can be pretty fragile, I've had them die on me on the way home from picking them up from the breeder before and go "man!!!! that sucks!!!!" Not the breeder's fault, they appeared perfect healthy when I picked them up.