One of the corners is at (168381105.794, 6200158247.368, 700.000) so it’s far away from origo. If I move the an edge, using “Move Edge” under the “Solid Tools” tab, the result is very strange. In the example below I move the selected edge straight along the z-axis (vertically).
I tried to work around the problem and move the geometry to origo, move the edge, and then move the geometry back to the original position. The result is much better, but there are still graphics issues as seen in the picture below where I changed the perspective of the geometry to better show the problem.
As was said already, you can either move closer to the origin or use meters.
What is going on here is that the math in Rhino 5 uses double-precision accuracy for its operations on geometry but the display mesh is only single-precision. This has been changed for Rhino 6.
If you search a bit here on the forum you will find a lot of threads on this. Just one example: