If you are getting tuxedo offspring then you have a rosetta/tibetan/italian in there. Pharaohs do not make tuxedos in any combination. A&Ms will all have a genetic marker spot, it will be on the head or on the back, they were selected for this trait to identify them as market (meat) birds. Either you are referring to the marker spot or you have other genetics in the pen. There are white winged pharaohs but they are not tuxedos, they are specific line from JMF.
As far as having all white birds thats what happens when you cross recessive whites to visual whites.