Compliance Manager Job State

What does the  different state in the compliance Manger job table mean?  

Why are the files in the  Collectionservertracefiles folder not being deleted or processed. 

I currently see in the jobs stable  25 records with state 2 and  105000 records with  state 1 

in the CollectionServerTraceFile folder I have close to 210 K  files sitting there!

Your help would be greatly appreciated!!!