Hi mrwebmaster, thanks for your message. In my own testing I became aware of this issue and am working to resolve this, my solution has been to migrate the custom Checkout fields into a custom Payment Gateway, this way the partial credit card details are not shown on the My Account page. This release will be available shortly.
I’ll be migrating the changes I’ve implimented on the GetShopped.org Support Forum here including Subscribe to Topic and working favourites for Topics and Forums. 🙂 I’ll move your Topic to the new Offline Credit Card Processing Forum.