If someone accesses a funnel using an affiliate ID then they are registered as a lead, but then if they go back on the funnel / page without using the affiliate link then its not tracked.... This needs to track every payment if they were introduced using the affiliate link, not only when they make a purchase using the affiliate link. There should be a time out option for this too.

There is also no way of manually adding future payments on a subscription to an affiliate either. Each payment has to be done manually every time its received.