Report Bug or Cheater?

Hi,
I get attached by some people that in the mail report they have 4 or 5 fighter but when i check the battle report, they have 6 or 8 fighter.
I don't know that is the bug report or they are cheating..

Please help.

I didn't find the right solution from the Internet.

References
bit.ly/2CqGs3I
Medical Device Animation Examples

Thanks