I've noticed that when certain substitution positions are not always occupied, that it can happen that the same position gets different indices in different molecules. I took a screenshot to illustrate. The last molecule has an R2 at the R1 position in other molecules and the R3 should probably be R4.
This makes it diffucult to perform additional analyses. Is this something that can be fixed? This also brings me to another question, would it be possible to have an option to show unsubstituted positions as either H or as an empty cell?