The first is a known variety known as the Die II Electo D 'g' variety. The second is a known flaw that occurs on several plate varieties of the 2 shilling maroon. The last appears to be a Plate 1 Die II variety that also includes a break in the nearby frame.
I have the B&W Specialized Catalogue's for both Kangaroos and KGV. You can find it new on eBay
if you really want to get into all the various known varieties.