ABV of molasses wash

[SomethingObscure]

I was wondering if this is a correct way of measuring the ABV of a molasses + sugar wash.

Not sure if my maths is right. Or if this kind of calculation is correct. I know that the SG reading can't be trusted with a molasses wash but I don't really understand why.

Day 1
6l Molasses + 26l water
Specific gravity = 1.082
Day 3
Specific gravity = 1.041
Alcohol content 5.38%
Added 2kg sugar + 2l water solution
Specific gravity = 1.055
Day 4
Specific gravity = 1.040
Additional alcohol 1.97%
Added 1.5kg sugar + 1l water solution
Specific gravity = 1.051
Day 8
Specific gravity = 1.028
Additional alcohol 3.02%
Total alcohol 10.37%

Is this just nonsense?

Cheers SomethingObscure