Customer created via API is always associated with admin website?

Question

I'm creating new customers in C# via the SOAP v2 API because why not.

I've set the website_id and store_id attributes of my customerCustomerEntity object to 1 which is the default main website and default main store respectively. The customerCustomerCreate() request then goes off without a hitch.

Unfortunately, when I check out the created customer in my Magento admin panel, I see that it's incorrectly associated with the admin site and not my default main site.

I'm using Magento 1.8.1.

If anyone have any ideas about why this is happening and how to fix it, I'd be eternally grateful.

Thanks. :)