MPLS TE Affinity Attribute

Hi René i have this topology created showed below , R37 is the (HEADEND) and R39 is my (TAILEND)
i have seted the atribute flags to 0x1 to upper path , 0x81 middle path and 0x80 lower path, my doubt is why if i set from R37 : show mpls traffic engineering topology path destination affinity 0x80 mask 0x84 the command traffic displayed goes from R37 to R39 ?

Why this happens?