Capture a sample from a track using Rekordbox DJ not working

This is a continuation of my original post here since I stopped receiving help after the first comment by your staff: https://forums.pioneerdj.com/hc/en-us/community/posts/115017571763--How-do-you-record-capture-a-sample-from-a-track-using-Rekordbox-DJ-?page=1#community_comment_115003834743 

My DDJ-SB is connected to my Macbook Pro and using Performance Mode in Rekordbox DJ. I have already checked to make sure that I am in [Preferences] > [Audio] > [Input channels] > [Input Record]. It says MASTER OUT and below it "Control Device Information" is Pioneer DDJ-SB which is my controller so no problem here.

As suggested by Pioneer staff in previous post, I opened the "REC" panel and used it to record. This is one way to create a sample, but it's technically not a sample (Capture) but a Recording. 

Take a look at this screenshot below.

Notice how Slave_capture in the first slot of the sampler is a "capture" and stored as a Capture under Sampler (see file tree on the bottom left). This is a sample I created when I first used Rekordbox but haven't been able to do again. 

https://www.dropbox.com/s/8ldzjhhbenyodc2/Screenshot%202017-04-14%2014.15.46.png?dl=0

With the method you described, you must give it an artist name, track name, etc. and it gets stored under "Recordings" in the file tree. 

There is a difference between a Capture and a Recording and how can I capture a part of a track to use as a sample instead of recording it?

Thanks