Don't trust Tynon... lol- that's probably best! But, as Kaisim said... once you upload a form... it will remain unless you send a hero to the inn. If you upgrade gear or runes.. that won't reflect unless you set the heroes up and reload the formation. I lose in knockouts... but I load my form for prelims and it doesn't change.
right, thats what i was saying: if the hero is NOT out of the inn it will disappear from the form screen but will stay in the actual battle form until you update. if you would have let the fight go on without changing anything, you would have noticed that you are still fighting with 2 subs