Precueing

I bought a stereo splitter from Best Buy , and I turned out split out, the problem is I am hearing the same track on my headphone and speaker , it is not splitting the songs for precueing. Please see images. Am I doing anything wrong or do I need different adapter.
I could not buy the recommended splitter that you posted from amazon it is out of stock.

the problem is you bought a stereo splitter…wrong thing! Sorry! You need this -

https://www.sweetwater.com/store/deta…

OR Better

https://www.native-instruments.com/en…

Good luck!

Thank you DJ STratoferris for the advice, I will buy it from the website you recommended. I did not know that stereo splitter and DJ cables are different.