What is your VTune version? Latest VTune Amplifier XE 2011 Update 8?
What did your mean of "23 clock ticks for app to run 15 minutes"? Elapsed time? The tool reportselapsed time in"seconds" in summary tab. Did you feel that "CPU Time"of specific function was incorrect? Please attach result directory and point out which data was wrong.
1."amplxe-feedback -create-bug-report logfile" when you met a crash, to generate log package
2. "amplxe-feedback -send-crash-report latest", to send Intel Customer Support team.