The statistics swimOneCm, diveOneCm, and climbOneCm are only checking to see if the player in the correct position, not what they are doing. If the player flies in the correct block (in creative mode or with elytra), the statistics will increment.
MC-101241
Swim, dive, and climb statistics also register flying
Resolved
Awaiting Response
1
Is this still an issue in the most recent versions (currently that is 1.10.2, or 16w43a) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.