In the illustrations in your attachment, the measurements written on the measuring cup include fractions and mixed numbers, and those must be transcribed in Nemeth Code. So I would suggest putting the whole tactile graphic of the measuring cup within Nemeth Code switch indicators.
The measurements written on the graduated cylinder and on the beaker do not contain anything that needs to be in Nemeth Code, so their tactile graphics should be in UEB. [They could be within Nemeth Code switch indicators that are required for something else (e.g., the measuring cup)]
Does that make sense and help?
Oh, please don't beat yourself up! We are all learning, feeling like we know it, and then learning some more!!!