Running 2010. Not running any LISP.
2010...well perhaps it is the SAME problem as with these versions
Autodesk® Civil 3D® 2006
Autodesk® Civil 3D® 2005
Autodesk® Land Desktop 2007
Autodesk® Land Desktop 2006
Issue
You noticed that when you used the MVSETUP command multiple times in combination with the UNDO command, the right-click shortcut menu and the order of command execution were changed.
Solution
To revert to the previous behavior
1.On the command line, enter PICKFIRST
2.When prompted to enter a new value, enter 1
This will reset the right-click menu and order of execution to the default behaviors.
Are you using MVSETUP?