Hi Melissa.
I'm very sorry: I tried to bypass this issue using the CB Connect plugin from Joomlapolis.
Then, your test went well because, at that time, you were not using the Sourcecoast plugin to login but you used CB Connect.
Now I disabled CB Connect and enabled your JFBConnect plugin and now you can try another login test in order to reproduce the issue.
I prefer to use your plugin (instead of the CB Connect) because I very like it!

I can also give you an admin access to the backend if you need it in order to investigate this issue...
But, in meantime I found another related issue: I need to use a Joomlapolis plugin named CB Conditionals in order to show/hide CB fields depending on other field data.
I found that this extension is working only in the standard CB registration form and it's not working in the form generated by JFBConnect.
You can test the difference here:
www.eupuru.eu/test/cb-registration
You have to select the value "Sardegna" in the field "Regione" in order to show the second field "Comune" and you have to select the value "Sassari" in this second field in order to show the field "Quartiere".
Instead, in the form generated by JFBConnect plugin it's not working and no field is hidden.
I very need to use this show/hide feature...