Rarity should automatically enforce order
We can currently select some nonsensical rarity option such as from 10 to 1, getting no results. It should instead internally order the arguments as required.
Thanks for the comments. By internal order did you mean the result should be sorted before being outputed?
I should have been clearer.
It is possible in the interface to set rarity to something like this: 
This way we get no results. It seems useful this way also worked and it would just flip the rarities by itself.
That is ... clearly a bug :) Sorry about this! I am working on refactoring the code/web UI. I think this bug should go away in the new version!
Thanks for spotting this ~