My matches have now been updated.
After my sister's update I made a note of how many matches I had on maternal, paternal and both so that could at least have a vague idea of where the newly labelled might be. The number given by Ancestry is 1,554 newly labelled matches. By my calculations I make it 1,122. I suspect the other 400 maybe in my "hidden" matches!
My both sides matches have increased by 21 but still do not include the one "both sides" match that I had identified myself