Not to say that your wrong.
But did you consider that they might be The Tanzanian subspecies?
I've kind of developed a theory on the whole subject that I've been wanting to share with some fellow pyxie lovers.
If this is common knowledge I apologize.
These pictures are of frogs imported from tanzania and were said to be the Tanzanian subspecies of adspersus






I believe they look quite similiar to the frog in your caresheet.
But my theory is that pyxie frogs that have the three stripes are one subspecies or another of adspersus while the ones with one are edulis.
This is a picture of freshly metamorphosed P.edulis. This picture was taken from TheFrogRanch.com

And here's a picture of an adult from their site.

Something I just thought of today/tonight is perhaps the Tanzanian subspecies of adspersus could be an integrade between the two?
I'm not trying to start an argument or any conflict here. Just thought I would share my thoughts with you all.