Hi,
Couple of things stick out.
Those sound like defensive strikes not feeding strikes so it may be a good idea to run through your husbandry to see if there is anything that might be tweaked to make the snake more secure or likely to eat.
Secondly, it sounds like you may be defrosting the mouse incorrectly and actually cooking it slightly. They really should be able to withstand a strike from a 2 month old ball python without disintigrating.
Can you give us a description of housing and how you defrost?
dr del