Athlon argos btr

[Ashlo84]

Hi all, I recently mounted an athlon argos btr 1-4 on a rifle. I used a burris pepr mount 30mm as is the scope. I used a wheeler torque wrench to mount. Scope states 25in pounds the mount states 20inch pounds. I set the wrench just above 20. Mounted the scope and as I acquired a sight picture I noticed if I canted the scope I could see a reflection behind me. So my sight picture was basically a broken image of what I was aiming at and whatever was reflecting off the ocular lens.
I can't find anything online about what causes this or if it's common with a crushed tube. Thanks in advance!