Ember Source problem

[anuragsu...@gmail.com]

Dear Ember user, 

I plan to use ember to tabulate unsteady flamelets, I start from a pure mixing solution and record the flamelets in time.  This is ember configurations i use 

################################################

 output = 'save/'

 conf = Config(

     Chemistry(mechanismFile='Base_OMEs_PAH.xml',

               transportModel='UnityLewis',

               kineticsModel='standard'),

     Paths(outputDir=output,

           # logFile='ex_diffusion.log'

           ),

     InitialCondition(flameType='diffusion',

                      restartFile='./prof000103.h5',  # Pure mixing solution

                      fuel='NC12H26:1',

                      oxidizer='N2:0.85, O2:0.15',

                      Tfuel=363,

                      pressure=6000000,

                      Toxidizer=900,

                      xLeft=0.00,

                      xRight=0.04,

                      centerWidth=0.002,

                      slopeWidth=0.001),

     StrainParameters(initial=500,

                      final=500),

     General(nThreads=48,chemistryIntegrator='qss',errorStopCount=1000,

             splittingMethod='strang'),

     Grid(vtol=0.13, dvtol=0.14, gridMin=5e-7, gridMax=0.0001),

     Times(globalTimestep=1.0e-8,

           profileStepInterval=300,

           regridStepInterval=600),

     TerminationCondition(tEnd= 0.8,measurement=None),

     OutputFiles(fileExtension = 'h5',firstFileNumber=0))

 if __name__ == '__main__':

     conf.run()

##############################################################

This is what the flamelets look in temperature 

and this is what I have as progress variable (combination of CO2,CO,H2 and H2O) vs Z in time.

However when I compute chemical sources from the functionalities provided in Utils.py of ember i get fluctuations and peaks. 

a better view of the problem can be this 

So I wanted to know if I am doing something wrong or there could be some other way to avoid these spikes 

Thanks and Regards