Creating a password account with a gmail address

[giliwerner]

It appears that whenever the user enters a gmail address, it automatically connects them with Google Plus as the identity provider.
This brings up 2 issues:

1. We would like to be able to create a password account with a gmail address, and not force the user to login with their google account.
2. There is not way to connect with a gmail account if it's not the account that is connected to the device.
   For example, my device has the gmail account: example1@gmail.com.
   If I try to login with the identity toolkit and the email: emaple2@gmail.com, it tells me I have to sign in again ("A change in your account requires that you sign in again").

Am I missing something?
If not, Can you fix this limitation?
Thanks

[giliwerner]

I found this:
http://stackoverflow.com/questions/32740191/force-sign-up-with-the-google-identity-toolkit-on-ios
Which suggests I set the rollout percentage to 0.
However, when I set it to 0 it is just being ignored (it keeps displaying as if there is not number there at all). When I set it to 1 (%) it works, but this will only work for 1% of my users.
Looks like a bug in the developer console... What can I do?