For some achievements, I noticed that even when you do what the achievement requires, you still don't get the achievement. For example, I placed 9 adjacent maps together in a 3 x 3 area in item frames, and i still didn't get the "map room" achievement, even though I triple checked that I had done everything right. These are the achievemnts I've noticed are affected:

"Map Room", "Smelt Everything!", "Sound the Alarm!", and "Super Sonic".