bottom row for 7 unit would be
1.5, 1, 1.5, 7, 1.5, 1, 1.5
or for 6.25 unit
1.25, 1.25, 1.25, 6.25, 1.25, 1.25, 1.25, 1.25
The bottom row just needs to add up to 15 units, however you want to get there. Just remember that anything over 2 will have a stabilizer, and 2unit through 3 unit will have the same dimensions for stabs.
Winkeyless is the same as the 7 unit space bar but omits the single unit keys and part of the top cover blocks that space so all other keys are in the same position.
Looking at your bottom image your layout does match what you have listed. It just isn't a common setup.