Im not getting reports of broken features?
when i do I try to fix them asap.
I prioritise emails i get through the link in the menu; over Mac App Store or MacUpdate comments/reviews (I dont check all that often in either of these places).

as for the cache items, Safari sometimes preloads some sites in the background on launch. Top Sites can be an example of this. Are you sure this is not whats happening?
or perhaps even HandOff/iCloud are regenerating data.

If you are using the trial, then you should have the scripts correctly installed. The MAS version requires a separate download to comply with Apple policies.