I figured it out, basically if you have 1 skill, and fight the strongest monsters in the game straight away, your exp goes over what its meant to be at, but it fixes itself over time so its not a bug at all, but I just got it so far ahead it wasnt fixing itself, but after awhile it balances out, so its not a bug

This is true - You can only gain one skill level per attack. Assuming you kill the mob instantly, the EXP bonus you receive at the end puts you well over a low leveled skill's requirements. Following attacks will ensure a skill increase due to the EXP being higher than the requirement.
Will label the thread, since it truly is not a bug.