I have a 1211. I have different problems than you do with it and CalMAN, and I couldn’t use it at all with the latest CM 4.6 beta and latest Jeti FW. I had to roll back the FW and reinstall CM 4.5.
Yes, it usually won’t read the sync, but on about a third of the displays I calibrate it will. If it doesn’t read the sync, I click on the 0.0 sync reading, change it to whatever I need it to be, and then press enter on the keyboard. Don’t click the initialize button after that, just exit out.
Sometimes I wonder just how much testing Spectracal does with this high end gear.