So, not sure if this is actually a glitch or not. But either way, best I write about it than stumble about aimlessly.

So, I've been messing about with some TF enhanced weapons using the joint tool. And one thing I've noticed is that, whenever I duplicate the model or load a previous save, all the changes I make to the model gets reset.

Is this something that other people have noticed? And how do I stop it from resetting?