Why do you want to "combine" those audio tracks?? Simply to save space on the workscreen? It seems from the images of the waveforms that they are, indeed, three different audio streams. In which case, perhaps the "simplest" method is to highlight just the section containing those tracks and go to File>Export>Audio as wav. Then you can mute those three tracks and import the new audio file in exactly the same timespace as the originals; you could even delete them (after successfully unlinking them from the video).
However, that may have the disadvantage that the relative levels between the tracks are now fixed and so no longer adjustable, though this may not be an issue for you if you do not need to adjust those levels.
But, on a "deeper level" I would want to know why there are those 3 streams! What was the originator of your wmv file? Also can you please follow this tutorial and post here the results of the MediaInfo data of your file?
I'm attempting to change the pitch to disguise the persons true voice but when I do it, it only affects one and the other tracks sound like the original making it it appear as an echo. I will try what you suggest and let you know if I have any issues
From the image it looks like the WMV video clip has Surround Sound encoded audio, in which case you need to either:
Apply the same effect to all 3 audio tracks
Ungroup the audio from the video and delete the 2 lower audio tracks. Depending on the recording device or source, these should be the rear left/right and the centre front (LFE) audio
Jeremy, you can easily copy the audio effects to another audio object.
Right-click on the object you have applied the effect to. Choose Audio Effects>Copy Audio Effects. Select the effects you want to copy then click Continue.
Right-click on the audio object (you can highlight multiple objects using the CTRL key) you want to apply the effects to, then Audio Effects>Paste Audio Effects. Those effects will be pasted into the objects you had selected.