cancelled transactions ?

just got the message from ebay about protecting my selling account.

They upgraded my stars etc

Looking down my dashboard it says 0.53% of my transactions had defects.

Hey,  what defects???

Then i notice cancelled transactions = 0.53%

So because 2 buyers purchased in error, one international when the system should'nt have allowed it, that is considered a defect towards my account??

If thats right it sucks