For example, I incidentally added to a black list and in white the same sender and when receiving mail it automatically gets to Recycled folder.

What to avoid such situation in the future, can make:
1. The first verification of the white list and then the black
And if the addressee is in the white list, in black to ignore
2. Or
If you add to the white list, and the addressee is in black, reported about it
(and if you add to a black list, and the addressee is in white)