why 2 - step ever needs to be off?

[RSM72]

I'm reading the 2-step threads above, but posting separately as I'm not sure how monitored they are.

But, to check my understanding:

- you configure 1 macro for dps, and 1 for "proc"
- you configure isboxer to alternate them - so when I hit 2-2 on main, it will go dps-proc on toons
- you create a key that toggles so that you can make it go 2-2 on main will be dps-dps on toons

My questions are:

a) is the above description correct?
b) why would I ever want to toggle the "2 step" to off?

With the 2-step macros set up as described in the other threads you have the dps- and proc-macros bound to say '2' and '3' and make ISboxer alternate between 2 and 3 each time you press 2. Now if you are doing anything but fighting npcs you dont want your 2 key be a 3 sometimes. So you need to switch the two-step behaviour off at times.