My website is running live, (1.4version based)

By default in nopCommerce there are 2 roles:

1st works for those who registers on the website (I don't know the name of this roles as it is by default, i don't know if this role has a name or not )

2nd is Administrator, (role name is Admin, am i correct ?)

many people already registered on my website, so i guess they are in 1st category

Now if i create more roles from the admin section, will it create problems ? i mean many people already registered on the website, if i create new roles in between, will these newly created roles will conflict with the new registrations ? because after creating new roles, if somebody registers at the website, the code will provide that new user which role ? the very first default role ? or the roles that i created ? of the account will be inactive unless i put the new user in a role ?

Please guide me in a right direction...