"But also I have another strange issue of this type that I still can´t figure it out why. I have a chest sorted only with *stairs, no commas, nothing. And this one also can´t recognize. All the stairs are going to another chest with no filters Maybe the * is the problem?"

Taken from #369

@toticorrea I just tried to reproduce your issue and it's working fine for me.

I placed two Sorting Chests, one has a high priority, white-list Custom Filter with just "*stairs", the other is a low priority with no filters. Maybe it's a priority issue in your case?