If the top tube and down tube are both bent, you can safely bet that the fork is also, at a minimum, pushed back towards the down tube, which means the front wheel is closer to the down tube than it is supposed to be, and the geometry (not to mention steering characteristics) is off. It's also quite possible, perhaps even probable, that the fork is bent. Check for fork alignment with he head tube. Also check for fork damage by testing the ability of the fork to turn freely when suspended in air.