Problems with achievements

[Sturwandan]

1. Coward and Brave Heart are lost after sync. Sometimes they reappear after solving a problem, which wasn't "ghosted". Overall, I don't like these achievements because Brave Heart is too easy to lose by accident if I opened a puzzle by a misclick. I was able to regain it by leaving and solving another level.
   Last time, I got Brave Heart reappear after the syncing new levels was completed.
2. Magellan, Clone Master and Recursion Man seem to work.
3. I didn't get Spirally even though I have solved almost all popular puzzles and none of remaining ones resemble a spiral.
4. I got RoboGuru and Half way in the same time, when I had about 8 popular puzzles remaining, so both are buggy.
5. I didn't get "The answer to Life, Universe, and...", even though I solved all popular puzzles with difficulty below 50 or so. Maybe I will get it if I solve non-popular puzzles with difficulty exactly 42, I didn't test that, but the description says that only popular puzzles are required.