subscription paypal unexpected result

Hi there,

I just recently experienced an unexpected result for a subscription that I made. I set in the subscription "starting point" the level to be assigned, then Mode: "Finite", Period: "2 days", Price: $1.00. So I expected the results to be the following:
After a period of 2 days, the subscription will end. However, after 2 days (today), I received an email from paypal informing me that I just paid automatically $1.00 for another 2 days. So it seems like it's recurring. Please advise, thank you.