Seems really excessive, the track doesn't look like it's loose but it's hard to tell. We had some issues on really hard pack and we tightened it up and it went away.
I was told these 1500's need to be a little more on the tight side.
I also own a 1500 and expierienced the same track jumping on hard pack and deep powder. Tightening track was the cure. If you let it skip on sprocket to many times it takes the teeth off or rounds them off thus making it easier to skip a tooth in future.
On our machine there are 4-15/16" bolts that hold the front axle on, loosen these up and there should be threaded tighteners on either side, I took two full turns on the side that was jumping and then tightened the axle bolts up. Repeat if needed.
in the book some where I read that when in a hard turn on a down hill slope to have the track skip a little say once or twice if it happens too much additional tension is needed. be careful not to over tighten it they wont skip but the belts will stretch and the grousers will break. also as the belts stretch they become thinner allowing the grousers to come loose.