Thanks for all you replies, seems a little clearer now.
I can see that this feature could be useful if you are on the website, but once you are out in the field and using the app I can't see the point of showing a cache further away than the one I'm heading for, and no way of tuning this feature off.
After reading the release notes it does sound like it will stop after 2 or 3 finds, but as I'm a newbie and have only found one cache so far the popup is still appearing, so I'll have to put up with it a little longer.