Topic/migrator user management

This text needs improvement:

 - We should probably explain that we migrated from the old OTM1 system to the new OTM2
 - `Thanks for using the OTM1!` -> `Thanks for using OTM1!`
 - `We there were multiple accounts created for your email` -> `We saw that there were multiple accounts created for your email address`
 - If we say please contact us, we should include an email address they can contact us at.

@RickMohr @dboyer your thoughts?