How to round-robin a hotkey(s)?

[ecwolfify]

If you created a new Mapped Key using 4 well... 4 is already in use by default unless you deleted that
Mapped Key. So, either edit your existing FTL DPS 4 key and delete your new one or delete the default
one and use the new one you created -- You can't use both at the same time.

Issue Resolved.

Thank you so much Mirai and all replies!

I don't know why I didn't think to go under FTL DPS and just tick the round-robin box there. /derp