I made a video of problem with brake pads not fully engaging: Cyctrac EM5 brake problems
After a lot of trial and error I finally found the solution. I installed 185mm rotor and now it's ok. I ordered a few EM5 bikes and all of them have the same problem. If you contact them they tell me that...
So the issue with derailleur is now fixed. It wasn't installed properly. I checked the manual and installed the right way.
Regarding brakes I think this adapter will fix the issue: SM-MAF220P/PL
I adjusted another time, but it's seem the problem is in cassette, the biggest (50T) gear. The cassette has only 300km. Also, I added a new chain. When under pressure the chain wont sit properly. Maby a better cassette will fix this issue?
The rear brake is now ok. Front brake it's not ok. On first photo you see I removed washers. On second photo you can see upright original Shimano adapter, down is this adapter, that is installed. It's not the same dimensions. Still if I install original Shimano adapter there is still 2-3mm too...
I observed (and adjusted correctly) but the problem is under load that on granny gear the chain don't sit nicely to this gear. Maby the cassette is of bad quality.