In Game Trade - Stat Filter Advice

Here is the process:
1. Select + Add Stat Filter
1a. You input

2. Select + Add Stat Filter (because you're adding more than one)

3. Then the Stat you typed in step 1 is there.

You always have to delete the previously inputted Stat before adding more.
I suggest that once you select a stat filter and proceed to add another, the text box is blank so you can quickly add another.