WordPress login on multiple computers

Not sure if this is the right forum but I’m having serious issue with my logins.

[ Moderator note: moved to Fixing WordPress. ]

I’m trying to maintain my site at both home and work. I’ve created the site at home and made an admin account that I can use. When I got to work it said the password didnt work. So I reset the password and then I could use it at work.

I went back home and then the login didn’t work again. Again reset. Use it.

Next day, arrive at work, try to login, again password error.

I used the same password for all instances so that there would be no confusion.

What could be the issue?