The only factory ammo I have ever had shoot off target in a gun was Remington corelokt. Never will shoot it again.
But I would say that’s a 1% chance what happened to you. 99% likely you just didn’t hit vitals or something crazy happened. Was there any brush you were shooting through? Either one of those shots should have been lethal. I don’t think I have ever had a deer get away with a good high shoulder shot. Hard to say what happened. Sounds like you did about all you could do trying to find her.