I'm having a similar situation on my Macs. Whenever they sleep and then wake, Xcode wants to have quit out (my app is running in Xcode - so it is prompting me to stop the app first). If I stop my app Xcode quits as if it had been command-q'd during sleep.... I can repro on multiple Macs here.

I've moved my build bump script to the archive section of the scheme so that it only does it on archive vs building now. Not sure if that helps anyone but it reduces the number of times I've had to reset the package caches (for now).

I too am looking for > 10 columns (as well as the ability to edit cells). Any solutions would be appreciated.