Hi Jamie -
I just answered your question on Facebook, but here it is again for anyone else who might have a similar situation:
"If you want to use the "Generate Multiple" method of creating assignments, I would recommend using "Custom Subsection" as the assignment type. Use "Worksheet" as the type of custom assignment, and choose numbered subsections. These are written with a dash instead of a decimal, but I think it would still work for you. Your worksheets would be numbered 2-10, 2-11, 2-12, and so on. I'm not sure what the full range of numbers is for your worksheets, but play around with the assignment generator (using the back button as necessary) to create the most accurate list of assignments for your lesson plan."
Also, I forgot to mention that your other option would be to create assignments one-at-a-time. This would be way more time consuming, but you would then have absolute control over how your assignments are named and listed. You could put the Worksheet number, i.e. 2.10, 2.11, 2.12 and so on, in the "Segment" field; and name your assignments "Worksheet ;seg" which would automatically enter the appropriate Worksheet number.
Hope this helps!