engines n1 an n2 problem b737

hi 

i am flying the pmdg 737 for msfs for about 1 year now. i have about 500 flying hours. but i have a problem 

when i start up de plane in cold and dark configuration the n1 and n2 already have numbers. i thing when loading op at an airport my n2 is already at 29% and n1 at 3% don't know the exact numbers. after lots of lying suddenly the n1 and n2 are not at zero! whit only the battery and grnd power on. 

i was looking in the ground maintenance page in the CDU, i saw a "reset eng egt" function. but that didn't do anything! i bought the pmdg 777 a few days ago. but i have the same problem already!

is it an maintenance problem? or is are something whit my airplane codes?

i really want to make my flight sim as realistically as possible! but something like this can really bothers me!

thank you already.

with regards 

Max Acherman!