Hello there,
I am creating a channel using exercises from the CK-12 and Khan Acamedy (English - US curriculum) public channels and I have been running into the same issues described above. I am wondering if there have been any updates with these issues.
Operating System (e.g. Windows, MacOS, Linux):
Windows
Browser (e.g. Chrome, Firefox, Safari):
Chrome
Channel (Name of the channel you were working on):
EwB Revision 
Description of problem:
Resources disappearing after being imported from the public channels.
Deleted resources and exercise questions reappearing after being deleted.
The order of topics changing while navigating through other topics.
Also, yesterday, I tried publishing the channel (48 exercises containing one question each) and it is still at 0%. I am unable to cancel as described in this post:
Thank you for your support!