•Gave Building B "Require Power Level 1" and "Require Power Level 2"
•Cannot build Building B (Removing Require Power Level 1 fixes this, but then cannot be build in Power Level 1)
For the second part, Require Power Level 1 and Require Power Level 2, have you tried using an OR instead of the AND, since the only way this might possibly work is if you had a power level 1 and power level 2 in close vicinity to each other, which is I'm guessing not what you are aiming for. Just a thought.
Regarding:
Test 2
•Gave Building A Power Level 2.
•Gave Building B "Require Power Level 1" and "Require Power Level 2"
•Cannot build Building B (Removing Require Power Level 1 fixes this, but then cannot be build in Power Level 1)
For the second part, Require Power Level 1 and Require Power Level 2, have you tried using an OR instead of the AND, since the only way this might possibly work is if you had a power level 1 and power level 2 in close vicinity to each other, which is I'm guessing not what you are aiming for. Just a thought.