[Rasp]

The insides of the torx bolts get jammed with dirt and grit. It may seem like the bit won't fit but what is really happening is the hardened dirt is not allowing the bit to fit into the bolt correctly.

I had the exact same problem you had and I thought I was going nuts. I then started to clean out the head of the torx bolt and eventually stuff started to flake out. I then put the bit in and it worked.