Hi adum,
a few days ago I put one of my problems into the sandbox. Later I corrected some mistakes and removed the cross at "Select to make part of your sandbox play area", then pressed "Change" at the bottom of the site. Afterwards the problem was neither on the site nor in my sandbox.
My suggestion is: If one removes the cross in one of the two fields "Select to ... sandbox" or "Problem is active on the site" the other topic should be activated to avoid that a problem is getting lost in nirvana.
Best wishes,
Hans
{Posted by Hans}