After each case webinject writes output xml file with case number. But after webinject closes connection by timeout (180 sec - default) it don't write output XML file. The result - next case writes xml in file with its number-1.
case 180 - timeout 179.98 sec. out/180/ - xmloutput of case#181
/out/181 - output of 182 case and so on so on...
After second timeout closed connection - iteration adds +1 and start to write
to case number-2.