As I was working through the process, I needed to delete some characters so that I could replace them with the correct ones.
For some reason it wasn't working.
But I did delete half a dozen emails from my computer.
The chance that I wasn't trying to use my computer keyboard to make changes on my iPad?
If Apple were really smart, they'd have a thingamy in the keyboard that could recognise which screen you are looking at, and adjust the input location accordingly.