Make the outline of the shape straight

I have a question regarding something in corel draw I have seen many times but never have got an answer for. In corel I do a lot of typeface work and small DTP projects. In the view for document window I work in ENHANCE View. When I need to go into WIREFRAME View. I see some lines not straight. in regards to the dotted line in Wireframe View. How do you make the dotted line straight. Even some dotted lines at angles have the non-straight line. Meaning from 1 end to the other the line is not straight. See the picture below of if it shows. To see what I mean.

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