I have updated the problemRandomize.pl file to only make the rerandomization permanent when you are acting as yourself (not as a student). So students can change their own problems and you can change yours, but you can't change theirs (unless you are using the type-in or checkbox seed and hit the SUBMIT button rather than the CHECK button).
Hope that resolves your problem.
Davide
WeBWorK Main Forum
Unexpected randomize problem behavior
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