Will try and explain it best i can, others can feel free to help out too, I will use my team as an example.
I had C on Fyfe who played on Sunday and V on Cotch who played on Saturday, Cotch scored 135 and i decide thats more than Fyfe will score and i want Cotchs score as captain.
So on Sunday morning i find a player who is not playing this round and who's team hasn't played yet (Read from Geelong) and i swap him with Nic Nat who also hasnt played yet.
I put the C on Read and set Nic Nat as the emergency.
So Fyfe stays on the ground, i put Read on the ground with the C, Nic Nat as my emergency. Because Read doesnt play i get Cotch's score as captain and Nic Nats score is counted to my total because Read doesnt play and NN is my emergency.
Does that make sense? Can anyone help evo and explain it any better