Inaccurate Profile Location - shows as default Oregon

I understand the 4 ways Klaviyo updates a user’s location :

1. A profile's first Opened Email event (but has never purchased): Klaviyo uses IP to update timezone and location.
2. A profile makes  first purchase: Klaviyo uses the billing address from the purchase event data to update location and timezone.
3. A profile opens an email any time after making a purchase: Klaviyo will update timezone, but not location.
4. A profile's repeat purchase events: Klaviyo uses the billing address from the purchase event data to update location and timezone.
   
   Two issues:
   Why “country/state for profiles in scenario 1 are set by Klaviyo to  default to Oregon, USA ?
   All of our Klaviyo visitors (that never purchased) are set as such. In reality (backed up by Analytics) only a tiny proportion of our visitors/customers are based in the USA.
   
   2. For profiles (no purchases) for which we have their full address, we have updated their address details via API , but Klaviyo persists the “USA, Oregon default , despite the customers being actually located in the UK and the update reflecting a UK address. (note : when updating via API, we have  referenced the relevant Klaviyo properties State/Region,  Country, Zip Code)