2 persons play on the same account at the same time in season mode

Hi everyone! Recently in a match of single season mode, I met a player with 2 controllers, which seemed to be 2 real persons using the same account, playing the same match with me! I'm from PC and "they" are from PS/XBOX. I once connected 2 controllers directly to my PC, but when playing season Mode, only 1 controller worked. So I thought that the only way to play with my friend was we both buy EAFC25 on accounts and we could barely coop season MODE.
As I played with "them", I time-out and found the 3 players in the match were named as Longzhuo66(me), "ABC" and "ABC"(1).

Why there were 3 players? Can I play with my friend on my account playing season MODE? How can they play?🤨😣

 I was confused....... Is it attributed to PS?🤣😍