I found out why this is happening - though I do not have a good answer on how to fix.
<-------basically the IIS log Starts at midnight (or your time setting)------->
' #Software: Microsoft Internet Information Services 7.5
' #Version: 1.0
' #Date: 2015-06-03 00:00:00
' #Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc-win32-status time-taken
' then log data occurs LOGS LOGS LOGS DATA HOST LATENCY YADDA YADDA ETC
<-------later in the day the headers appear again------->
' continued from above log data occurs LOGS LOGS LOGS DATA HOST LATENCY YADDA YADDA ETC
Software: Microsoft Internet Information Services 7.5
Version: 1.0
<------- this is where the splunk forwarder parses the log and creates "Source type iis-# ------->
Date: 2015-06-03 00:00:00
Fields: date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc-win32-status time-taken
' continued from above log data occurs LOGS LOGS LOGS DATA HOST LATENCY YADDA YADDA ETC
this will be the standard until a new IIS log is created -
VICIOUS CYCLE REPEATS UNTIL ADMIN GOES CRAZY AND MOVES TO MEXICO
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