I have several paid and unpaid levels of memberships. One member was already upgraded (as a gift) and he just upgraded himself to a "lower level" and made a monthly payment. In other words, I gave him level 4 access free of charge and he decided to upgrade himself to level 3 by making a monthly payment. How does this happen in the system? Second question, if let's say level 2 is now $5 a month and I decide to increase the cost to $7 per month, how will this affect the current members in that level, i.e. how will it affect their monthly fee? I want them to be "grandfathered" into the original fee, not the new fee.