Intensity Failure?

Hi Community!
I have a question which came to my mind while using CellProfiler.
I use MeasureObjectIntensity in 2 pictures in 2 ways
One time with cells discarded that touch the border the other time not. The intensities differ between the two ways and I do not know why? The pipelines are completely the same only this one thing is different?
Can someone help me?

Greetings Lorenz2Intensity%202%20(1)1Intensity%202%20(2)