Probable cause for (new) rear suspension left sag?

I understand Tacomas have an inherent marginal left lean by stock standards. But I'm wondering if this still holds true after upgrading the suspension and if my measurements are normal or way off.

Front: Fox 2.5 / Allpro arms
Rear: 2.0 + Allpro 3-leaf AAL
*All factory settings
*Level driveway for measuring
*No abnormally large weight inside

I measured the rear wheel gaps post install months ago and they were very similar 0.25" difference, maybe... I hit a trail last weekend and today while cleaning the truck out I noticed a larger near 2" difference. Right side wheel gap (fender to top of tire) is sitting at 8.25" while left gap is 6.5". Gas tank is a little under 1/4 tank and nothing in the bed. Just from a glance theres an obvious tilt to the left of the rear; very annoying to look at.

Has the left side "settled" and the right side has not?

 

Hi, I don't know too much about the lean on the gen2s but I know on my gen1 I took it off-road and did same thing. I noticed the rear frame is a "C" frame and twisted the frame a little from flexing. Maybe something to look at??? Let me know if you figure it out though. I'd love to know the cause.
Tim

 

I'll take a look into that. It's really odd seeing the left shock compressed so much and the right is floating high like it was just installed.