“Being that braille formats states that this should be changed to a list (B.F. 8.5.1d) as the example shows because these are unrelated columns, my question is what do I do abou the blank space?”
BF 8.5.1d does NOT say this should be changed to a list. What it says is that IF you are transcribing something in nested list format, you don’t use multiple columns.
What you have is a skeleton table and should be transcribed according to BF 11.9.