Stroke width appearing thicker when using Cintiq

[Sebaldo Pietrovito]

For some reason when I am using my Cintiq 22 the strokes in my illustrator doc appear thicker than they should. When I export the lines apear as they should. 
When I change my Cintiq display settings to optimise for my Mac book the stroke width in Illustrator goes back to normal. 

has anyone else had this problem? 
thanks

seb 

[Monika Gause]

Which tools do you use for drawing? The brush tool? In that case a brush is applied and pressure might set the width and make it thicker. Did you compare this and check in the Appearance panel?

[Sebaldo Pietrovito]

Hey!

I use the pencil tool 

[Monika Gause]

And the stroke is thicker than a stroke when you draw with the mouse?

Can you please show both objects together with the Appearance panel?

[Sebaldo Pietrovito]

Basically the lines I see in Ai are not the true width as what they should be. When I export the image I can then only see the true width of my strokes. 

I think that Ai is not reacting with my Cintiq properly, when I switch my mirror screen mode to optimise for Mac the lines in my document show as they should again. 

I used to also have this problem when GPUwas turned on. I have to have it turned off now.

 I'll provide an image when I get time. 

thanks

seb

[Monika Gause]

Please show something - or better yet: upload files.