Keeping winds or dragons in the hand
The app treats them as Flores, so they are exposed and replaced.
Counting four groups and a pair
That is a common 13-tile structure. This 16-tile game needs five groups and one pair.
Calling Chow from anyone
Chow is limited to the previous player’s discard. Pong, Kang, and win may come from anyone when legal.
Stopping Seven Pairs at fourteen tiles
The app’s shape is seven pairs plus one Chow or Pong group.
Treating Sagasa as a discard claim
Sagasa happens when you draw the fourth copy for your own exposed Pong.
Adding flower points at the end
Flowers and seasons do not add points to the official app score.