Bead names are not assigned by the manufacturer. The beads are given descriptions by a vendor or palette author to describe a particular bead. Therefore, some descriptions will vary from vendor to vendor.
What you might call brown I may call chocolate, brunette or mahogany. Just because the description of the color is different doesn't necessarily mean that BeadTool's palette or the vendor is wrong. It's just a name given to the bead to try and further describe the characteristics of a particular bead.