Manual upgrade by admin in Membership doesn't credit the referrer

Hello, I set up membership with affiliate plugin.

In the membership, I have 2 levels:
- Free (no comission)
- Premium (50% comission, already set up in the subscription plan)

I'm using manual payment in my membership. So here what happens:
- John signs up as a free member using Jane's affiliate link
- John makes the manual payment and notify the admin
- the admin updates John's subscription from Free to Premium
- But Jane is not credited for John's payment. Her statistic only shows Unique Clicks = 1, Sign ups = 1, Paid members = 0, Debits = 0, Credits = 0, Payments = 0.

Shouldn't Jane's Paid members become 1, and her Credits adds up?

Thanks,
Jimmy