Hello Guys,
most keyboards have an numpad and if you have an numpad on your keyboard you have additional keys like "-" (Add) key. The problem is that this two keys have the same name ingame but there are different keys and they were handled as different keys.
Steps to reproduce:
Bind your first slot to the affected key on the main part of the keyboard
Bind your second slot to the affected key on the numpad
Hit both keys
You see that in your settings the keys have the same name (Picture attachment) but there are different keys.
Suggested Solution:
Name the key on the numpad "Keypad [name of the key]" to be consistent with "Keypad Enter"
Affected keys
Minus -
Slash /
Number keys
Dot .
Can confirm using both minus keys.