I have 2 Mikrotik devices, for some reason, Winbox only saves one password at a time, so when I try to connect to the second device the password is incorrect so I need to reenter one.
Once Winbox knows the pass for the second device I cannot connect to the 1st one as the pass in incorrect and visa versa
Yes,
within the winbox open
Just check the box keep password put a note in the note filed and click on add/set do the same for the other device but put a different note that why you have saved password for each device