Rear Lift question

Ok, I have the AAL in the rear from the Toytech Ultimate lift for my 2013 and used the Bilstein shocks for it. However, everytime I am looking at the truck it looks like the shock covers (plastic that goes over the rod that connects to frame) is always disconnecting from the bottom piece behind the tire. Anyway to fix it?? Also, should both shocks be covered in grease on the outside??

 

I just installed some pro comp shocks with covers like that....I ziptied them on. In fact, the zip ties came with the covers.