Hi, I am lvl 11 now, completed all quests (what are available at this lvl), and when last quest completed, my achievements also disappeared.
Second problem, that there is something wrong with achievements, look at this picture (shoot some hours before my ach list disappeared):
It says I completed 15 of 21 available achievements. Since there are 7 types of achs, I think the original way was to reach lvl 3 from all types of achs. But as you see, on some type I am at lvl 5. The program let me go over lvl 3. This way the max of 21 achievements seems to be low, not enough.
(I hope I get back my achiements.)
Island is ZX71