I am not sure if this is a bug report or a feature request, so please do re-label it as you see fit.
When only one search result is available (or, for that matter, a number of results that doesn't exceed the first page of results), I feel that it would be appropriate to not show the "More Results" button. It is misleading UI, and can make the user unnecessarily click through to find more results even if there are none.
See a screen recording demonstrating this behaviour below. The related search can be found here.
Unrelatedly, the screen recording shows a search time of 26.08 seconds at one point. This is a bug I couldn't replicate so I have yet to post a separate bug report for it.