How to understand return data from iTunesConnect?

Question

Apple App Store

Hello,

There is an application with subscriptions (week, month and year). In statistics for yesterday, a strange return slipped

In Subscription -> Summary, I see that the refund was 1


In Sales -> Units, I see the number "-8" in the chart and -4 in the table, when filtering by territory



At the same time, the return was in the USA, but there weren’t really any purchases in the USA, and it’s strange that these 8 returns went through in 1 hour, judging by the statistics in 24 hours. For money, it also shows as a return for 8 units. Plus, I've never had one like this before.

I do not understand what it means. Is this some kind of AppStore error or I didn’t understand something.

Thanks in advance for your reply.