Honestly, it's pretty back and forth on if you are or not. On one hand, I don't know if it's possible to have Mods and Hacked Clients at the same time, and considering you have the mods enabled, it may disprove that in total. On the other hand, it seemed a little off on the second fight, as the guy was being hit even though you weren't facing him in a manner that would be attacking him.
But I feel how you feel. I've been blamed for hacking countless times on the PVP servers, and the people who blame me are people that either use the 1.8 pvp instead of 1.9, or literally target me after I've killed them, getting worse every time they try. And I was blamed for the sneak hacking, even though I wasn't hacking then, either.