Hello @Spencer27,
Did you receive a message, by notification or email, saying that a guest requested to cancel?
If you did and you accepted it then Airbnb takes it that you initiated the cancellation. It's a sneaky, underhand way that Airbnb uses to ensure that a guest who wishes to cancel can get a full refund, including the Airbnb fees. If the guest did the cancellation themselves they would loose the Airbnb fees.
For each of the cancellations you could check your notifications or emails to see if you received such an email.
If the guest initiated the cancellation, rather than sending a cancellation request, you should have received a notification and / or email saying "We regret to inform you that your guest XX cancelled reservation YYYYYYYYY ...".
Steve.