Make a new Group Cavalry and Horsearcher then disband it again and all your troops are again in the right Formation. You actually don't have to do anything with the slider. Just create a new cavalry formation and remove it again immediately by clicking the + symbol. It's a bug, you're not missing anything.
So starting to understand something and that is that Companions have only Two really useful roles to play. Whats important to understand early is that the best use for them is to have them roaming around protecting your lands towns villages and recruiting! Why because later in the game when your recruiting and or flipping nobles these companions and their troops become the stock that you're Bannerlord uses a new mechanic revolving around a clan system, unlike previous Mount & Blade games. Every lord is attached to a certain group known as a clan, and you create yours when starting
As for companion gear, it just disappears with them it seems. All equipment goes with the hero/companion you only get a heads up when your character is near death while everyone else just happens. I tend to be more bummed on the ones in my party more than their equipment because I leveled them up 🥺.
A minimalistic mod for maximum compatibility. Become friends with as many companions as you feel like. Note that this mod just "removes" the cap, but the game has a limited number of companions. There are mods that add/unlock more companions. Downsides/balance: It's very expensive to properly equip all your companions.
. 196 203 113 122 96 187 279 325

mount and blade 2 bannerlord companions