Yeah, definitely a misunderstanding in the approach to the calculator then. 
Think of it like this:
The desired strength (speaking of nicotine here) is what you want to end up with.
Say you want to vape at 3mg.
But you bought 48mg nic in PG.
Click your “User” tab (drop-down)…
Then select (click on) “Preferences”…
where you’ll then see the area used to set your mix ratio (and costs).
Once you’ve set your costs, etc…
Then when you go to create (or adapt) a recipe…you can set your needs in the upper portion of the screen:
And if you plan to repeat the basics [VG/PG ratio, and amount of nic], then simply check the box at the bottom that says:
“Set these base values as default”
Amount to make is the size of the BATCH (meaning are you making 30ml, 60ml, etc of a recipe?)
Desired Strength is what you want your NICOTINE strength to be in the final outcome.
Desired PG / Desired VG: means what you want the final ratio to be in the finished mix.
(as you can tell, I tend to mix for 80vg/20pg)
I buy 100mg nic though (to freeze, and it also helps in minimizing the amount of PG being added to the mix, since I have to mix at 80+vg, or I have issues thanks to PG sensitivities). So you’ll notice in the “Nicotine Strength” window, I entered 100mg.
In PG content of Nicotine, I entered 100 (because it’s NOT a mixed suspension). Some nic is sold in 100% VG, and other nic is sold at 50vg/50pg. But realistically, nicotine can be mixed in, and sold at ANY ratio where the carriers (the PG and VG) are concerned. 
So from the above, you should now be able to see what I referring to before, about my nic being 100mg, and suspended in 100% PG. 
BTW, I respect the “attitude adjustment” and being honest, and it’s the whole reason I wrote this out.
I get where you’re coming from, and it’s a fine line to walk I’m sure… But PLEASE, do be careful and in full “proper frame of mind” when it comes time to mix. ESPECIALLY when it comes to handling and adding the nicotine!!