Markers are just clues.
For perspective: many of my bps that are Het for Albino have the 'Pied Markers'-yet are very much not.
One of my friends told me that his entire collection of Orange Dreams has the belly/caudal 'pied markers' as well.
I wouldn't base a breeding project off of markers unless the breeder told you that he is a Possible Het Pied and you are feeling lucky.