Trying to track down a rogue send somewhere.  My lead vox track is sending to the master bus, but I want it to send to another bus I set up for lead vocal.  I can get it to send to the lead vox bus but it still also sends to the master bus at the same time.  I have checked all the sends and do not see anything sending to the master bus which leads me to think there is a hidden send somewhere.  Any ideas ?

What version of SONAR?
Prior to the SPLAT versions only a limited number of sends were visible and you had to use the drop down arrow to see more.
 
As a matter of interest, why do you want a send going to your Vox bus (assuming the track output is already going to the same bus?)

So your saying the OUTPUT of the audio track is set to " Buss Lead Vocals" not the Master. 
When you solo the vocal track does the meter move in the buss? 
When you mute the vocal buss does the lead vocal still sound from the Master? 
 
if so look for an AUX TRACK or PATCH POINT sends
Also open this or the track manager