How does a business account, an “LLC” for instance, counts towards the one account that I can have, or the two accounts that my spouse and I can have when we have the same enroller?

A business account counts as an account for everyone that has an ownership interest in the business.  For example, if the husband and wife each own 50% of an LLC, that is the only account that they can have, individually or as spouses.  If the wife owns 100% of the LLC, however, then the husband can have another account, if that account has the same enroller as the wife’s business account.