Selector Editor groups attributes with same value together so can't use variable

I want to put a dynamic variable into a selector to iterate through the rows in a table.

Usually you would be able to go into the selector editor right click and choose a variable to replace for example the tableRow value.

However the editor seems to have grouped tablecol, isleaf and tablerow all together (because they all have the value of 1) so I can’t just right click and add a variable because it would be applied to all 3 values.

I know I can manually change the selector but the way the editor is grouping these things together seems wrong. Can this be reported as a bug?