There is an issue with the PayPal import (well several really which are extremely annoying).
However, this one cropped up yesterday when I imported some PayPal transactions including a payment to a third party in euros.
I paid (say) £10 converted via PayPal to euros (say) €11.30
That payment included a paypal conversion fee
When I imported the payment, the amount paid shown in the import was £9.85 (say) - ie it did not import what I guess was the conversion fee.
In my PayPal history I only see a conversion of £10 to euros, so cannot be sure but the import should pick up the correct amount!