GT upgrade/?

Went to do my usual 10 free God's trial blitzes on level 25-10. Wouldn't let me??? so I notice the arrow right is gold. sure enough, it scrolled over with locked monsters up to 30-10 did a battle at 25-10, cleared it through 30-10 and now have access to level 13. of course i'm still finishing one last party member at level 11. LOL When did they upgrade this?

WckdMistress