Strange Rear tire wear

I'm having odd tire wear on rear tires. Maybe 2000 miles on them. Starting to notice center is wearing faster which is likely due to a little too much psi. Strange part is that they look to be wearing at a slant from back to front? So the first block is lower on rear of truck and gets higher towards front.

 

We love photos.

Can you tell us the manufacturer & make of the tires and the tire size and the air pressure that has been in them for the 2,000 miles?

 

Sorry couldn't take pictures when posted. Toyo open country at 2 Xtreme 305/70/17.
First pics are from pass last 2 are from driver's side
55.5 in drivers 57 pass

 

Apparently it's from too much tire pressure, which likely increased from frigid temps when the tires were out on and inflated and now the temps are warmer. And the odd wear...I was told is from wheel hop from being light in the rear