Do your texture files actually have such longish names with dashes in them, or does the screenshot only
show them as they are after shapeways' and/or zcorp's software munched them ? I'd assume the latter,
with 647318-544606-1 being shapeways' internal order and/or job number for this piece, and the partial
duplication in the name of the "missing" file could then point to a software glitch - something like
647318-544606-1-texture1.png and
647318-544606-1-texture2.png
being accidentally merged into the one long and strangely complicated filename. (And further speculating
that the original filenames in Gweetle's zip file were just "texture1.png" and "texture2.png". it would seem a
bit over the top to ask the customer to contact the printer manufacturer ??)