@Guvnor is correct. The 2 coins are from a chest. The 5 coins are from beating an Atlantis level. If you are confident that the 5 coins are for s2 5.10h, then you probably only did normal on 6.10 and the level is still open in hard. If you need someone from SGG to look into the official record, you can contact them too. See link below.
