i dnt use a pod  so i cant  answer  for that.  what im working  with  is  a jam vox  which  does  what the pod does.

           if everything your  using  works fine as an individual  item   the way  you  want them to but  not all together   it could  be  the sound card is being  overwhelmed  with too much data   all at once so you  may just   have to do a track at a time to record.  i dont  record   on the  computer  myself  i have the software but dont use it  .  im still using  an old  4 trackwith tape   so i can kep it  analogue. i take a two track with me if i go  out  dump it to 4  track  here  and if needed   then i dump i to an 8 track i have so i still have control of all  8 tracks  thats  pretty much all i need  but if i had to i  could  figure a way to sync them all   .  i hear   alot of people  are going  back it analogue  anyhow.

               back to the  sound

                                                                it may be that  you need to  upgrade your  sound card  for the  ammount of  input   your using  as the one you have cant  handle everything  at once  or it could  just be   you need to make   ajustments   in your current  sound card

                                for  example   if you open  a  few  music  vids  at once  one will over ride the  other   sound wise  while   you can still see all the vids  running.

   so  id look there to start