open your profile, search this line:
<CustomBehavior File="Misc\InstanceTimer" Timer="Check" WaitTime="720000" />
the XXXXX is just a placeholder. yours should have numbers.
change it to <CustomBehavior File="Misc\InstanceTimer" Timer="Check" WaitTime="360000" />
and you won't wait 12 minutes until an instance is finished, just 6 minutes.