What the...(control issue)

So I'm creating, yet again, another set of paper patterns. This time I'm using three different noise patterns and allowing the user to select the type of noise being used. Everything went dandy, submitted the filter, and then thought, "Why did I duplicate all those controls? I could have used one set, and then just pointed them to every block!"

Problem is, I went back and modified the filter, using one set of controls rather than three seperate sets (one for each mode), and all the previews changed - and changed in a major way. So I went back in, copied and pasted the control block, attached one set to each type, saved, and just like that, the previews were back to how I had originally intended (with only minor modifications).

So why the discrepancy? If the variables are the same, why would it matter if I used one set of controls for each kaleidescope variation vs one per selected type?

Electric Paper lsingle controlp.ffxml

Example from the single control.

Both filters work just fine and produce identical results. Some of their presets do look different, however, but that is because they use different values for controls.