Different LCA's?

I assume what you're getting at is to see if the unibody is square. Right now, I have jack stands under the frame rails and have the driver side torn down so I could get the LCA out. When I replaced the K-member, it went in without issue so assumed the unibody was straight.

WIth that second measurement, yes. With the first, you're checking to see if that K frame is made straight. Stranger things have happened. At this point, I wouldn't assume anything. You've got a problem somewhere. How long does it take to measure?