Timmy's attempt to loan one of his fairies to Amanda ostensibly fails because she wasn't as unhappy as she used to be. But what if it also failed because it was redundant? Think about it, there's already a powerful Reality Warper magical being watching over the girl, caring for her and using his powers to entertain her — Norm. So Amanda couldn't be loaned a fairy godparent since she had a genie godfather.
