What I see as potential problems is...
1. Housing two snakes together that aren't breeding. Boa are not communal animals.
2. The temps could be a tad warmer for the Albino, as they don't absorb heat as well, lacking any dark coloring. And a light isn't the best thing for them either, as it tends to dehumidify the air, as well as increase the potential for fire. Try getting one of these, it will prove well worth it in the health and safety of your snakes...
http://www.reptilebasics.com/ultratherm-undertank-heater-uth-11-x23.html
3. What do you use to monitor the temps and humidity? Those little dials and strips that most pet stores sell are questionable as to their accuracy. For about $13 at Wal-Mart you can get a digital read out that will monitor the hot side with a probe, the cool side by placing the unit on the other end, and the RH of the set up...
4. Have you considered the animal may be blind? Wait till it's dark, and check on her with a flashlight, and see if her pupils dilate properly. If they don't, could be the answer to a couple things.
5. 2 months is not long for a Boa to go off feed. Certainly not long enough to warrant forced feedings. Force feeding is VERY stressful, and should only be done as a last resort. You will CAUSE stress by practicing it.
Hope that helps.