Is usb audio mono or stereo

This is not a stereo microphone. There is no left channel. If you are recording into a stereo input, you need to split the input into two mono inputs, and record each channel as a mono track.

This is because the G Track's Mic signal is on the Left channel and the Instrument signal is on the Right channel. You are making a stereo recording when you should be making 2 mono recordings. Does Nicecast have an option to set the track to mono Left channel? Traktor should, but I haven't used it so I can't tell you where the option is. There's probably a Track Input drop-down or something like that.

Your microphone is a mono input (one), therefore recording in stereo is not practical. Stereo inputs are left and right (two inputs). Whatever your recording setup or audio workstation, the track you record to from your microphone needs to mono.

u need to check ur pan or mono/stereo setting for output/input

I havent played with acid a lot... but this is what i can tell you... most of the softwares have configurable inputs... seems like your inputs are configured as stereo input and hence it will pick up the signal from both the left and right discreetly... which means that you would need to feed audio to both the channels for the meter to pump on both bars...The other option is to PAN the track center and not hard left right... this would get audio to both ears of headphone as well as the output meters...
these are basically some of the few things tht will get u sound on both ears and bars...
The bigger question here thoug is why do you want to record in stereo?? and not mono?

To get sound in both channels in Garageband for a podcast using the G-Track Microphone:    select a voice track to record into    make sure the Track Info window is open (blue i button in lower right region of screen)    at the bottom of the Track Info window you will find Input Source:    Change the default setting of Stereo to Mono 1 (USB Audio CODEC)
This assumes you have gone to Garageband preferences and changed the Audio/Midi settings for audio input to USB Audio CODEC which appears when you plug in the G-Track Mike

Disagree with previous post. The GTrack is designed to record vocals and a mono insrtument at the same time. That's its main selling point. It should also allow monitoring of both the vocals and guitar alongside the playback from the computer. In your computer's Control Panel, go to sound preferences, select the usb microphone and click on advanced tab. It is likely yours is set up to record 1 channel at CD quality - this is how many ship for some reason. Set it to 2 Channels CD quality.
In Sonar, set your track input as USB Left for the vocals, and USB Right for your guitar.

press F4 to open device panel. there you must be able to select inputs and out puts fromyour alesis interface.
be in stereo or mono(check your alesis specifications to know how many mono and stereo inputs it has.
then when you create a new track on the right side of the sequencer window. you must see a input and uut put routing tab
so if you whant to record voice in one track select the inputs where your mic is plug
create a new track and select the other input
so for shure it will say alesis INPUT 1
alesis INPUT 2
alesis INPUT 3
and so on depending on how many inputs your devices haves.
you say it haves 2. but
are they 2 only in stereo
or two in mono
or one mono+one moni+one mono+mono
for a total of 4 inputs in mono mode and 2 in stereo mode.
i dont know witch device you have so i cant tell.
if you have any questions let me know

push the monitor button to go mono instead of stereo.