For example, say tennisace is playing Oglemi. The matchup is listed as "Oglemi vs tennisace". Oglemi must tell tennisace his lead first, then after both leads are sent out, tennisace will tell Oglemi which move he will make that turn (if he switches, he will say which Pokemon he is switching to). Turn two, Oglemi will tell tennis what move he will make, and so on.
This should be rewritten then. It is very unclear that in turn 1 tennis tells oglemi his lead after oglemi announces his. Examples are easier to follow and part of the rules, so people are going to follow them when there are conflicting statements.