TBM + Longitude Altitude Adjustment

When I set an altitude with ALT-Sel (Longitude, or TBM), it generates strange altitude values in the display.
Is this a bug, or can it be set somewhere
See examples:
Uploading: b1.jpg…
Uploading: b2.jpg…
Uploading: b3.jpg…

Hi there,
You may want to edit your first oost. Those pictures did not load. Also, please move it to Aviation, Navigation, Communication, as that is a help subcategory.

Any mods installed?