yes i changed it. i typed in [EBB: normal] and [EBB: default] and it works fine but the other configs filenames won't so i suspect that it only work's for the config file being used in the settings. i could be wrong though.
Changing the background in a battle (or for the next battle) is a script call (or plugin command). Adding new backgrounds and adjust existing backgrounds is a configuration change, yes.
I think i know why, it's not working because config files i copied and pasted aren't being used in the plugin setting meaning troop tagging is only valid to that one config file at the settings. correct me if i'm wrong.
