If an existing Member purchased into a separate membership if they use the same email, then they would cancel their old subscription and would belong to the new membership. If they use a new email and have 2 separate accounts, then they would have 2 separate logins and see separate things in each members area.
A member cannot belong to more than 1 membership. Instead, you can setup so each membership has different content.
Then make the membership that the member upgrades to include all the content from the member's original membership.
You can do this by setting up content groups and attaching them to content.
, using Access Levels it is possible to have memberships, and "Master" memberships having access to all the items in the memberships below them.
You can also have multiple levels of this type of "extending" access (where the higher the membership, the more items you get access to).
Go to "Members
" then find the Member that you want to change the membership for and click on their membership
It will give you a list of available memberships that you can click on to change the membership.
After that, click the billing link
on the right side and enter in the amount you received there.
Entering the billing amount is not needed if you are not paying commissions.If using direct payment the process is different.
You would still change their membership, but instead of clicking on billing to enter the amount
you will click on the amount column
that appears next to the username and enter it there.NOTE: You will need to click the red suspended link to unsuspend them if they are suspended.