I tried to duplicate that and could not. I can't see a way that clicking the Update Info button changes the data plan setting.
Could you try an experiment:
1. Set the data plan to PP Only, then click the Update Registration Info button
2. Set the data plan to Bundle, then click the Update Registration Info button
3. Set it back to PP Only then click the Update Registration Info button.
This will communicate some info to the RDSS Registration server each time (including which is the current data plan).
I will check today if successive registration refreshes are indicating changed data plans each time (which is what should happen).
Leave it on the plan you intend to use. If you reliably can demonstrate (first to yourself) that clicking the Update Registration button changes the data plan from PP Only to Bundle, let me know and I can connect to your computer to see what's what. But, no one has reported this (ever), and it would have been a big problem for 15 years so far if that were always happening ...
Ted