Hi all!
I managed to get it the card rearranging thing to work for me and a friend (ginnypig prefers to be unnamed) so I am posting here as to what we did. We are using Firefox, in one tab we have the buy card (iShop) page, in the second the View Inventory Page to check.
If you have cards, its best to sell them all if you have a desired viewing for the six cards. Instructions in White
In a Tab or Window (for IE) Buy the card for the number 1 spot first, wait a few minutes and refresh the buy card page, then repeat this process for the others.
Check using a second tab (or with the window you used to buy the card in IE) through opening the View Inventory link or refreshing if its already open as you go (During you minutes waiting to buy the next one). If an error comes up as a result of the last card. Sell it and try the above step again. Update: Some cards like a certain position (for example L like to be in position 1 or 3, but I want him to be in the number 6 position, so I first buy the existing 5 cards in the order I want, then buy three level 1s cards. Once you bought the level 1 cards buy L, most of the time he will become number 6. If he does sell the level 1 cards.
Update 2: Its seems that this works for people with less then 10 cards, so if you have more then its really hit and miss. I am really sorry for this!!! PS. I slight oversight on my part sorry!

It doesn't matter if you are using IE, providing you can refresh the page. The tabs are a nice bonus really and makes it easier to manage.
This worked for us and I hope it does for you too!!
Status: 8 worked - 4 didn't, but 2 worked something out to make it work. Please let me know how you all go.
F