Thanks for taking the time to reply to my question. I'm a big fan of your Arch tutorials. They started me using the Arch workbench!
Regarding question 1. Good to see I didn't miss anything obvious. And I can not imagine this is the intended behavour, so I opened a bug report for it: https://www.freecadweb.org/tracker/view.php?id=3833
Regarding question 2: I should have mentioned it in the first post. I downloaded the latest version to verify, before posting the problem
OS: Windows 10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15816 (Git)
Build type: Release
Python version: 2.7.14
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.2.0
Locale: English/UnitedStates (en_US)
But I don't see the same right-click menu as you do (see below screenshot) What version are you using?
Thanks for your comment on my drawing in general.The floorplans are meant to allow easy hiding of logical parts of the attic. But I could also have used groups. (I switched over now)