If you have more than one NIH eRA Commons account, look for an e-mail coming your way from the NIH later this summer notifying you of potential duplicate accounts, and providing instructions on how to consolidate and select your preferred account once you are logged into eRA Commons.
While you may wear many hats (i.e. as a principal investigator or peer reviewer), the Commons is designed to allow a single account to perform multiple functions, even at more than one organization. Read more
here.