Yes as i had said in page 4... 
I would suggest editing your original sig post with the new image and Put * Updated** in the Comments somewhere, as to make it less confusing for the one having to collect all the sig's to place on the wall. uploading a bunch of variants throughout the thread only lends to the chance of getting the wrong sig used.
I would suggest those with multiples posted already, edit your posts so they all reflect the same sig you want used in the wall.
Those posting sigs for others, Please use the original sig post, just edit it for each sig variant, Then make a new post saying *jims new sig* with a link back to that post.
These are all just mock-ups and artists' conceptions. I'm sure there will be room for everyone on the finished wall.
yup right now folks are just having fun with the walls they have posted and sigs available, the official wall has yet to be chosen so there lots of time for new walls to be entered as well as sigs to be posted..