Suggestion: Make a new tab for maps that was removed from the map list, like aqua and happy hands, so people like me who like to see a 37/37 on the easy tab will be great. Bugs (the first one is just a reminder): Happyhands is required for the easy meta even when it's out of the map list. the easy tab says there is 41 achieves to get, when, including the unobtainable, it adds up to 40
Currently the counter for achievements doesn't take into account hidden achievements. There's a couple in in the easy section which have long since been scored off (eg healthy) but will still show as a potential earn-able achievement in the counter for players that still haven't obtained it. We do plan to update this to reflect it accurately, it just doesn't at the moment. We do also plan to have a legacy section to show what achievements were once attainable that you also unlocked - but are no longer the case. Currently any achievement you've unlocked (and is no longer attainable) will show for you - but not others in the same situation. As for the meta - that's been fixed now.