What do you mean doesn't really look like one? How does it differ? I ask because Pyrs can look different sometimes, My Naja doesn't have the fluffy long fur that Full Blooded Pyrs usually do, nor does Kathys Jake. If this Pyr has off coloring it doesn't mean it's not full blood, just not up to standard. Or it very well may be a mix, which doesn't make him/her any less loveable, just not all Pyr (and hey not everybody can be totally "Pyrfect"!
) The double dews may show up in a mix, it doesn't happen often, but it is possible, that gene may just have shown a little stronger in this dog then it did in it's litter mates.
Kinda like a child from a family with all black hair being born a blonde. her parents may have black hair, and their parents may have had black hair, but her great grandfather may have been a blonde, and that's where the gene came from.
I'd love to see a picture of this pup if you or your daughter has one. You know just to help answer your question a little more definatively, not for my own personal enjoyment at all.