I am not sure if I understand your question. Is the NumLock key turned on? If you use an international keyboard, please try an English keyboard if you have one.
After further tests:
Yes, EmEditor can show “Num 0~9” in a shortcut key.
** But it shows “Num .+-*/” as “.+-*/”.
e.g.:
When you add “Alt+Num /”, it shows “Alt+/”.