User Activity

I notice that on recent overseas purchases (I am in Australia) I am being charged gst for the total invoice, including postage. Surely this should only be applicable to the purchase price
I recently purchased an item from America, the final purchase price came up as $192.66 Australian, but when I paid by Paypal shortly after the auction finished I was charged $200.10 Why?
I have been unable to bring up my home page for three days & I get a message "Sorry we can't complete your request. Try again later" A box comes up "How to fix error 550. Takes only 2 minutes (Recommend). When I go into customer support, this problem...
Even though I sign out, when I go to sign in again my password automatically fills in. How do I stop that?