Cannot hear headphones in stereo. Feels like mono sounds.

After using this youtube example (https://www.youtube.com/watch?v=hTvJoYnpeRQ) to determine if my headphone is working or not I noticed that I can hear the left channel on the right side of my headphone and the right channel on the left side of my headphone (Essentially, I can hear both channels with just one side of the headphone). This is irritating me as when it comes to some games (Such as Counter-Strike: Global Offensive where listening and determining where noises are coming from), it is crucial to learn where the sources of the audio is coming from. This even happens when I listen to music and I get confused if it's from the left side or the right side of the music when the music I listen to does take advantage of 2+ channels. I have tried it on my old laptop and it can listen to both channels seperately, just fine. 

The laptop I am using the HP Envy 15-j058ca and I currently have the latest audio driver on it for 8.1 with the latest Windows updates. Is there something I can do to be able to listen the left and right channels on proper sides instead of hearing it as if it was mono? Thanks in advance!