Skin cache not updating

when refreshing the skin cache on the control panel for my skin, it only updated the 64 sized head and not the others. At times it also ended up with a steve skin head.

Links: http://minecraftonline.com/cgi-bin/getplayerhead.sh?Anna_28&18.png http://minecraftonline.com/cgi-bin/getplayerhead.sh?Anna_28&32.png http://minecraftonline.com/cgi-bin/getplayerhead.sh?Anna_28&64.png http://minecraftonline.com/cgi-bin/getplayerhead.sh?Anna_28&128.png