Thank you for the details, I'm starting an investigation. :)
1. Sort button, the game shouldn't even show empty lists, so here are two issues. ;) I'm currently here. When is it showing the empty list of recruits?
2. Need to check, I was trying setting Poleis-Merchant-Military. For now, it works for me, so I need to dig more.
3. Trading, someone reported it on Discord, this one should be fixed, just not released yet. I aim with the release for the next Sunday. I hope to fix all reported things.
4. Key bindings, didn't check it yet, added to the to-do list.