Well last week, the original Simplicity pattern landed in my mailbox thanks to Lanetz Living!
I am now the proud owner of Simplicity 7250, the original version of Simplicity 3559. And I was right, the double-sided one page instruction sheet has a different construction sequence than the re-issue.
Original instruction sheet
Re-issue instruction sheet
I'm going to make my version using the re-issued pattern but working from the original instruction sheet! Yes!!!