Spin String Confusion

Hey all, im working on wunderground reporting project for the spinneret that will report data from my wireless weather station. this is my first leap into spin and I am having trouble debugging out some strings and i was hoping someone could spot my error. i am using some "barrowed" code from jonnymac's simple gps demo to move some ascii characters around, and its acting like the strings arnt zero terminated when i debug them out through the parallax serial terminal object.

please help me understand, thanks!

the output on the debug looks like this:

Startup...
!!WX,225305,070912,  259,  786,  772,  296,  247
03:53:05
2012-07-10
  78.6
  77.2
  29.6
&2012-07-10  78.  77.  29.6 03:53:052012-07-10  78.  77.  29.6&realtime=1&tempf=
Finished...

it should look like this : &2012-07-10 03:53:05&realtime=1&tempf=
what i dont get is why it debugs the string for time correctly the first time after i format the data, but the second time i spit it out the debug, i get more data in the string then should be.

PUB Main | ch, hr, dy
  

  Digi.GetStr(@DigiBuf)  ' get string from ether
  Pst.Str(@digiBuf)       ' deebug string
  PST.CHAR (13)
  
  '''''''''''''''''''''''''''
  fcopy(@UTCTIME, @digiBuf, 1)
  hr := str2dec(@utctime, 2)                   '  get utc hours
  hr := (hr + (24 + utcoffset)) // 24          '  add utc offset
  utctime[0] := (hr  / 10) + "0"               '  convert back to string
  utctime[1] := (hr // 10) + "0"
  s_insert(":", 2, @utctime)
  s_insert(":", 5, @utctime)
  utctime[8] := 0
   
  Pst.Str(@UTCTime)
  PST.CHAR (13)

  ''''''''''''''''''''''''''''
  fcopy(@UTCdate, @digiBuf, 2)
  if hr <= utcoffset                           ' catch day shift
    dy :=str2dec(@utcdate[2],2)                
    dy := dy + 1
    utcdate[2] := (dy  / 10) + "0"             ' convert back to string
    utcdate[3] := (dy // 10) + "0"
    
  s_insert("0", 0,@utcdate)                    ' format for msql style time from mmddyy to yyyy-mm-dd
  s_insert("2", 0,@utcdate)                    ' add century
  
  s_insert(utcdate[6], 2,@utcdate)             ' move year to end of century
  s_insert(utcdate[8], 3,@utcdate) 

  s_insert("-", 4,@utcdate)                    ' add dashes
  s_insert("-", 7,@utcdate)
  utcdate[10] := 0                             ' terminate
  
  Pst.Str(@UTCdate)
  PST.CHAR (13)
               
'''''''''''''''''''''''''''''''  
  fcopy(@tempF, @digiBuf, 4)
  
  s_insert(".", 4, @tempf)
  tempf[6] := 0
  
  Pst.Str(@tempF)
  PST.CHAR (13)

'''''''''''''''''''''''''''''''
  fcopy(@humP, @digiBuf, 5)
  s_insert(".", 4, @humP)
  hump[6] := 0
  
  Pst.Str(@humP)
  PST.CHAR (13)

'''''''''''''''''''''''''''''''
  fcopy(@PresIn, @digiBuf, 6)
  s_insert(".", 4, @PresIn)
  presIn[6] := 0
  
  Pst.Str(@PresIn)
  PST.CHAR (13)
   
'''''''''''''''''''''''''''''''
'now lets spit it all out at once!
 PST.char("&")
 
 PST.str(@UTCdate)
 pst.char(" ")
 pst.str(@utctime)
 pst.str(string("&realtime=1&tempf="))