That happens pretty frequently. I can't remember exactly, I think it's if you enter a new level and the game considers you to be really weak for that level. I'm sure the experts will chime in
You can't clone a wand of charging, for obvious reasons. Otherwise you'd end up with infinity of anything you wanted.
You should be able to clone change material
Nice. Does zapping AND breaking the wand of haste make it last longer / more powerful? Or were you just showing breaking as an alternative if there are no charges?
Damn. Nice job. I see you changed material every time it got 3 flies.. did you ever forget to do it at any point? Did the weapon ever get weaker as a result of rotting?