I have a weird situation where line thickness in a block does not change despite appearing to while editing the block. I`ve tried changing layers, layer line thickness, custom thicknesses of individual lines, all to no avail. Example:

Editing block (block comprises Tolerances cell and the four cells below it):

Editing sheet (I`ve left the block now):

Regular drawing view (I`ve left sheet edit mode now):

Appearance in Foxit after saving as PDF:

My goal is to have the top line and rightmost vertical line thicker than the other lines (not counting sheet border), but so far haven`t been able.

Much appreciate any advice!

(Edit: Working in SW2014)