[chore] Review & sync documented extrinsic errors

[JoeCap08055]

In the course of expanding our integration test coverage, discovered that the errors documented to be thrown by extrinsics do not necessary in all cases match the actual behavior of the extrinsic. We should review and for each discrepancy take one or more of the following actions:

• Update documentation to reflect actual error scenarios/behavior
• Update extrinsic behavior to better model indicated error scenarios
• Add error scenarios to both the extrinsic & documentation