Is the backpack bottom slot supposed to dissapear when upgrading the backpacks? I know that with B42 some vanilla bags have it, but I found a OdysseyGear Travel Pack that had it, and after upgrading to Tier 1 it dissapeared and now I have the usual slots for: secondary bag, item slot 1, bottle slot and balloon slot. Even with that the upgrade options that this mod provides are awesome, just asking if this is an issue or it's supposed to happen.