VA Amex Paypal/Amex conversion credit

Hi - just wondered if anyone has experienced this or can explain it better than MBNA[:I]
I used my VA Amex to add 927 into my paypal account (I've a US $ paypal account). This worked fine, paypal shows;
11 Sep. 2008 Charge from Credit Card Details $1,667.63 USD
11 Sep. 2008 Currency Conversion Details -$1,667.63 USD
11 Sep. 2008 Currency Conversion Details 927.00 GBP
927 being the amount I needed to pay.
My VA Amex shows;
11 Sep 2008 Paypal pmt 972.91
and
13 Sep 2008 Paypal/Amex CNVRSN CRE San Jose CA $100.05 USD at .58650/GBP 58.68CR
Now I'm not complaining that I've received a 58 credit - but i can't see why - other than the oscillating dollar/pound ex rate having something to do with all this? [:?]
any thoughts?
thanks
Andrew
I used my VA Amex to add 927 into my paypal account (I've a US $ paypal account). This worked fine, paypal shows;
11 Sep. 2008 Charge from Credit Card Details $1,667.63 USD
11 Sep. 2008 Currency Conversion Details -$1,667.63 USD
11 Sep. 2008 Currency Conversion Details 927.00 GBP
927 being the amount I needed to pay.
My VA Amex shows;
11 Sep 2008 Paypal pmt 972.91
and
13 Sep 2008 Paypal/Amex CNVRSN CRE San Jose CA $100.05 USD at .58650/GBP 58.68CR
Now I'm not complaining that I've received a 58 credit - but i can't see why - other than the oscillating dollar/pound ex rate having something to do with all this? [:?]
any thoughts?
thanks
Andrew