I created a simple object style to have a 50% gray stroke or line around objects and to create that line at the size of 1 point. I gave it a shortcut of Shift 8.
1 - When I apply the style to an object that has a zero point stroke, it does not work. I have to create a 1 point stroke as a separate action even though I put 1 point stroke in the style.
2 - Once I apply the stroke to several objects on a page, they do not look all the same. Some are darker and even look thicker than others.
Below are my settings and then a example of problem #2:
In addition to what Manal said, what does the Control panel say about the stroke width for those that appear to be different widths?