ST5 Extrusion shifts dimensions bug

N/A
I am totally new to Solid Edge ST5, and working through the 'Introduction to Part Modeling'

The base rectangular block has been defined and saved. The rectangular region for the extruded cutout region is defined and dimensioned.

The extrude handle appears as it should, and adds and subtracts material as it shoukl.

However, when I left click to remove the material, the '36 mm' dimension lines flip from the front face to the rear face.

I have tried this on two very different machines, and it does the same on both, (running Windows 7).

The only other difference between the example illustrations and my screens is that the '20' thickness dimension for the rectangular block, appears on the bottom edge on both machines.

Any thoughts please? Any patches released yet please?

Thank you.