Cut line at an angle and now it shows up thicker than others and will not let me change

[camid89269821]

Hi, I am creating a design and wanted two of the lines to be cut at an angle to match to the outer edges cleaner. After finishing most of my design I noticed that that those two specific lines cut at an angle are thicker than the others and I can't make them smaller. It wont let me edit the stroke size and also when I click on them to see the color it comes out as a question mark. Is there a way to fix this or should I redo the whole thing? I'm not too familiar with AI.  (I attached a few photos below) I just want them (the third lines from bottom) to match the size of the fifth lines if that makes sense. 

[Larry G. Schneider]

You've managed to outline the strokes as shown by the highlight around the piece (as opposed to the central line in the other lines). How did you trim the lines?

[camid89269821]

I believe I trimmed it by using the knife tool

[chanaart]

Try trimming with a small point of the eraser tool! it does not change the width. I also tried wit the Scissor tool and it is ok. Did you do anythign to it to change width?

[camid89269821]

I was trying to cut the edge at an angle. I outlined the stroke because it was not cutting at an angle but now I seems to be a path and I cannot get it to go back to un-outlined.

[Mohammad.Harb · Accepted solution]

Redraw the lines with stroke color only without fill,

then outline the strok ( object-> path-> outline stroke) then trim the path.

[camid89269821]

Thank you that worked! do you know how to cut off the bottom path of the half circle? I want to see how it looks without the bottom part and I'm so bad at this.