5 times in the 15 rounds I played. every few battles when I clicked to face the next Challenger the 504 guy came up and it said "Oh No!

Already in a battle

You're already in a battle! Go to Battle"

so when I click the go to battle. It would take me to a previous (easier) battle and it would count as my 1/30 battles. At first I thought I just messed up. But its the site. 5 times this happened to me today o-0