Cardas Burn-In LP

Hi:
I received my Cardas Burn-In LP today. I'm using a new rig, for me at least. LP12 (10 years old), new RB-1000 arm and Rega Exact 2 cart. I've been playing with the various sweeps on the LP and they do what they should. I read through the other uses for the LP and saw that the 1/2" wide blank (no grooves) sections on side 2 can be used to check tonearm balance and settings. It says the arm should track slowly toward the center. Well mine races across these areas and actually jumps a few grooves into the next section. My table (particularly the path of the arm) is dead level so I'm questioning the set-up of the arm. My dealer set it up, as I have NO experience with this stuff.

Is this a serious thing that should be addressed? If so what do I ask my dealer to check?

Thanks!