Bit of a mixed bag. I'm not convinced by the inclusion of "exe" in that one group, and the "loser" group's solution feels like a bit of a stretch.

The other two groups are fine. The "ringtone" one is really tricky and was too difficult for me, but not unfair (just needs a better solver than yours truly).

I didn't get the "none" group so totally fell for it as a red herring in the other. The remaining two groups were fine and not "a bit of a stretch".

Don't hate me but is American English the preferred usage north of the border? I refer to miscue. Thanks for your grids.