Hi Val - I think what's happening is you're not pushing "Done" (or right-clicking) to fully complete that second Loft operation.

In that case it looks like 2 things are being undone because the undo will first cancel the currently running Loft command (which removes the Loft), before it executes the actual undo, which then removes the Sweep.

If you finish the Loft command it should then undo in 2 steps like you're expecting.

I suppose I could tweak this in v2 to make undo just do a cancel only in this situation, instead of cancel + undo.

- Michael