I've a set of spot colours on a design where selecting one colour jumps to the other colour. These two spot colours involved are identical in that they reference the same Pantone colour but have different names. Is this by design or possibly a bug? I've tried changing the colour to reference a different Pantone and the colour then remains selected, changing it back and it jumps to the other, identical one. Also, I have two other colours in the design which perform the same function but neither of these jumps to the other.
In case you are wondering I need to use two spot colours for the same print colour so that the exported PDF can be used to create separate plates as they have different trapping specs.