Strange behavior with pipes (Isolator)

Placing a Wooden Pipe next to an Isolator and applying a redstone signal does not properly empty the Isolator.

Instead of the logical effect: having the filled vials be pulled out and nothing else, everything is pulled out, starting with the input (left) area.

This bug seems to happen with the other machines as well, For example Inoculators will pull everything out, not just items that are in the completed bin.