I have to admit that the card I ordered for the Queens Golden Jubilee was very dark but having had to replace the original I made which was washed out and cropped too much,the end result was ok.

Hi Dolly, like several others I see yellow rather than white on your cards. I print my own cards myself as well and noticed that they often do not print out true to what I see on screen. I have to lighten them somewhat- often to the point they look too light, yet they print ok, so I have started to upload lighter versions to my store to be on the safe side (although not so light they will get declined). On your comment that it is too late to do anything about the uploaded cards, you could always upload altered versions and use the "replace image" feature on the cards.  
I like your cards and look forward to seeing more!
Karen