total pressure is less than static pressure
 

Hello!
I try to simulate 7-staged axial compressor and faced such misunderstanding: relative total pressure averaged on one face is lower than static one. Here is an example from CFX-POST:

Mass Flow Average of Pressure on S1 R2 Side 2
124181 [Pa]
Mass Flow Average of Total Pressure on S1 R2 Side 2
118307 [Pa]
Mass Flow Average of Total Pressure in Stn Frame on S1 R2 Side 2
146452 [Pa]

Why does it happen? Any calculation details?