Issues with plotting data in simulink

Hello,

I've got a problem with plotting data in simulink. The first 7 to 8 simulations doing well, but when i start the simulation (compleet_power9) the line of the graph is different then the previous. Hopefully someone has a solution or idea what i've done wrong.

And also with the rest of the following parts. You'll see big differences between (for example) number9 and number 20.

Thanks in advanced

Marcel