Left Rear Rubber Boot Question

Does anyone know why a left rear rubber boot would be binding up? It isn't casuing issues, but since my truck is lifted a tad, it doesn't look like the right rear one. I occassionaly keep pulling the rubber boot down to make it look like the right one. it is odd... anyone else noticed this?

 

Leaf pack contacting it ?

 

i didn't think about checking that.... anything you think i could do about it? the right one looks pulled down.... but the left one looks pushed up and i have to reach in and pull it down

 

What left rear rubber boot?

 

When I had the harsh ride Spring TSB done on my truck, it raised my rear so I put in the billies to level out the front.... well those springs were silver so i took the rear yellow ones out and put in silver billsteins to match... there are black rubber boots covering the shocks from the side of the truck... from the rear you can see the silver..... on the right side... the rubber boot is pulled down and stays that way..... on the left side the rubber boot binds up some... doesn't effect driving... but i do pull it down occasionaly, but it goes right back into the same position after driving.

 

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