Spawn multiple player controllers in multiplayer game

“isBeingControlled” is a variable in my character class. I never used it or changed its value anywhere besides “Get Player Character” block in controller blueprint and its default value is false because I want it only be set to true after a controller stores the character reference into Cast Player variable. After checking the number of elements in the array I found out that in the “Get Player Character” block the number of elements are 1 (Server) and 2 (Client 1). What does this mean in terms of networking? Thanks a lot!