On Tue, Oct 14, 2014 at 11:53 AM, Stefan Monnier <monnier@iro.umontreal.ca>
wrote:

> > Is this a bug?
>
> No, but it's a common trap.  Every buffer has as many "points" as it has
> windows displaying it (plus one for the buffer itself).
> So if you want to move point in a specific window, you need to either
> select the window before moving, or use `set-window-point'.
>

What would be involved in implementing something like a
`ielm-change-working-window-buffer' that behaved as the OP
expected?