Do you mean that the wide part of the headstock is made by two "ears" or "wings," one on each side? There are plenty of guitars made that way, especially some of the archtops with wide headstocks. Otherwise, you wouldn't get nearly as much use of a big slab of mahogany. Same goes for a scarf joint for the neck angle. It shouldn't represent any sort of shortcoming in the instrument, as a properly-glued joint like that will be stronger than the wood itself.
Here's a good link showing the luthier's method:
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