I dont think you need to be concerned just yet. I commend you on being very well read on frog husbandry before you purchased. I have a lot of respect for anyone who goes into it with knowledge enough to keep the frog happy and alive. Grif will be able to answer your question better than me but I can address a few issues.

1) Note that its common for Pacmans not to eat for a few days after moving. They 99% of the time overcome this, and the fact that the frog had gone a week without eating prior to this isnt all that significant. These frogs can go months without eating is come cases.

2) Yes, Pacmans will sometimes become picky after being fed nothing but large prey items such as rodents over long periods of time. A staple of rodents although is very unhealthy and can eventually prove fatal or cause blindness from fat deposits over the eyes. You may need to consider force feeding if this persists. I see no other option really. Ill admit that I know absolutely nothing about force feeding, what it entails, or if its even a viable option for an adult Pacman. I have never had to deal with this. Knock on wood.

3) Your humidity may be to high. Frogs skin is highly permeable and prolonged periods of 90% humidity can be too humid and detrimental. Try to aim for 80%. Try only covering 50% of the top with saran wrap. You also want to keep airflow high. Bacteria build up will hurt your frog.

4) Yes, your temp is to low. Your frog will at some point began to aestivate if you dont correct this. Your UTH is to small for a 10 gallon. Try purchasing the next size up.

Like I said Grif can answer more. They know more than be about Albinos, what light they are sensitive to, and how you can go about raising the temp safely.

Edit: I see your from Calgary lol. Cowtown represent.