I'd say try resetting it again in case something went wonky the first time. As far as I know you shouldn't have a problem using repeat passwords (after the breach obviously), I don't think they restrict that. Also as a side note in case your password is lengthy it can cause issues if it exceeds a certain amount of characters so that may be an issue as well. If it doesn't work after another reset (without having an error) you may want to try clearing your browser cache, and click the login button a few times.