Dream 11 adding their own teams in last minutes in unfilled mega tournaments. Picking of these team players are from matrix board (may be).
You can check filling contests at last 5 minutes especially Rs. 9999 with 25 team.
Tournaments with confirmed winnings always filled fast in last minute. Matrix picker will select all team players in shuffle mode that may be the reason for surprised player selection as captain or vice captain in rare matches.
It may be a type of non-identifiable digital way of cheating...
Just look at filling rate at normal timings and at the end, then proceed for your play in this...