As Helibrewer said, this is to be expected when the plane get loaded automatically by our system. If you load manually and load nose or aft heavy you will get a different THS.
It looks to me like the plane was "stuck" at 5000ft and thought that was the CRZ level. Would be interested to know if you can recreate this and maybe show a video of it.
I would agree with Crabby that it is likely a binding problem. Either that or the AT was configured wrong.
Either way, without a video this will be rather hard to troubleshoot.