The Weirdest Kind of Wealthy Affiliate Commissions?

Hey there,
Today I got one of those emails that we all love that goes by the subject "Congratulations! A New WA Commission!", so I got kind of excited and checked it out.
See the screenshot below:
When I saw that the commission from this sale was $8, I wasn't surprised because this is what we earn when one of our referrals pays $19 for the 1st month of their Premium membership.
The questions came when I read that this referral has been a starter member for 0 days. I mean, if he/she joined on February 12th 2018, he/she must have been a starter member for more than 100 days already! It's been more than 3 months since he/she joined! So why does it say 0 days as a starter member? I'm kind of confused lol.
But that's not all. After logging into my Wealthy Affiliate account, I noticed that this sale had not counted for the Vegas challenge, which got me more confused.
Then I checked out my affiliate stats and saw that this commission had been counted as a yearly premium membership sale! This got me even more confused because yearly premium membership commissions are $100+.
So my question is: if this is the first time that my referral has upgraded to Premium, why hasn't the sale counted for the Vegas challenge??
Has something like this happened to you before? I actually didn't know what to call this blog post, I thought "the weirdest kind of Wealthy Affiliate commissions" was a little bit hilarious lol
Hopefully Kyle, Carson, Jay or one of the super affiliates can reply to clarify these doubts.
Thank you, have a great day everyone =)

Let us know, I am very curious!
Kaju