When using the Champions Bundle personalization items (armor, weapon skins, stances) on the backwards compatible version of Halo 4 on the Xbox One, your chosen options won't always be saved prior to quitting the game. This results in you having to select the armor, stance, etc. almost every time you launch the game, and even if it does manage to save your choices once, those choices may be reversed next time you launch the game. It's very inconsistent.
Halo 4 - Inconsistent Saves on Xbox One