The simple answer is this...
It all gets down to whether the Presets are "sticky" or "temporary". And we can control this.
(If you don't have a Preset for what to want as the Default, you can create one. I'll explain that in PART 2 below. I think this is the case for 1-Sided option).
PART 1: Make the selected Presets persist, until you change them.
- On the Print Dialog page, near the top, there is a Presets menu (your's probably says "Default Settings").
Click on this menu.
- Then choose Edit Preset List...

- Another dialog will pop-up.
- Uncheck the box shown below.
Unchecking it means that you will NOT go back to Defaults on subsequent print jobs. This Preset will persist (sticky) until you choose something different.
- This behavior applies all Presets (both Standard Presets, as well as Print Job Presets). What is highlighted in the list (e.g.. the 2X) has nothing to do with the check-box at the bottom (just unfortunate confusion).

- Finally, you can now select a Presets, ,and keep them active for the next Print Job.
- When I choose my "Black and White Preset", it goes back to to it every time.
- Even when I click other options for a "one time" color print, it still goes back to my "Black and White Preset".
Note: If you want the old behavior (going back to Defaults on every print job), you can check re-check this box and go back to the original behavior. This may be handy in the case were many people share the same computer.
PART 2: What if the Preset you need does not exist? (optional)
You can create your own presets. There is little or no documentation on this, but I did experiment a bit with it, so take this with a grain of salt.
- On the Print Dialog page, choose the settings that you'd like to save in a Preset, but don't click the blue Print button yet.
- Now, click on the Presets pull-down Menu, and select "Save Current Settings as Preset"

- Type in a name for your new Preset.
Note: I prefer the Print Job Presets, over the Custom Presets, but you may want to explore both.

I did play with this, and this is how I was able to make the 1-sided option persist on my printer.
Cheers!
-Craig