Boundless

If you look at the date that I posted that it was before WoR had been released, and before I had read it. I knew nothing of Willshapers or Truthwatchers at that time. Post WoR I would have to agree with you. Truthwatchers are the 5th Order, Willshapers the 8th and Bondsmiths are the 10th. It seems to me that the Primary Attribute of Windrunners has a lot to do with the oaths they take. However, as said above, I hadn't read WoR yet, and I had assumed that every Order would have oaths pertaining to their Primary/Secondary Attributes. We now know that the Lightweavers make no Oaths beyond the first, so my theory doesn't exactly work. However its seems to me that Shallan is very Creative, which is Lightweavers Primary Attribute, and the Truths she must speak about herself to advance as a Lightweaver seem to be similar to Honesty, the Secondary Attribute.

Just a guess, but I think that Bondsmiths are the 8th Order because it's Primary Attribute is Resolute, and has the Surge of Cohesion. Also the prologue to WoK, where the Heralds break the Oathpact, would make sense from a Bondsmith's point of view.