There is nothing wrong with your tires u need to adjust yourself and proper tire pressure. I'm on my second season with mine and one thing for sure is proper tire pressure makes all the difference. For highway 36 front, 35 rear except in really bad snow and ice drop them down to 33 front 32 rear.
What I meant by adjusting yourself is that u were use to a certain way of how your suby handled and now has drastically bin changed and u will have to change your driving habits. The lm-60's r a great performance winter tire as I have no complaints but I know exactly what u r experiencing hope this helps
Edit: if this issue still persist then I would look at getting an alignment. Also is your suspension stock??