DENA

I have a 6-month-old TAG and he (seems to me) to have trouble balancing, hangs from his toys and falls, he also tries to jump off everything...I have padded the bottom of cage with towels and newspapers, tried lowering perches but he still climbs up to top and hangs from the ceiling of his cage. Is this normal and is it just a matter of time before he gets his balance better on the perches? The breeder said he hadn't learned to perch until a few weeks before I got him. She had him in an aquarium. I asked about the weight because I don't know if he is too heavy and that this could be part of the problem. I took him to vet for a health exam and he weights a little over 300 grams. He eats Zupreem pellets but I am trying to convert him to Harrisons....Any help with this is appreciated thanks! Dena