@2204008HBM8M ,
When you're in Model Space, See how your scale is set to 1:1?

Then, when you go to your Paper Space and enter your Viewport, See how your scale is set to something else?

...That is your problem. To fix it, do the following:
1) Set the scale inside your viewport to: 1/4" = 1'-0" (then, lock your viewport)

2) Then, go back to Model Space and set your scale to the same thing (1/4" = 1'-0")

3) Then run the REGEN command

4) Then, adjust your LineType Scale(s) to their appropriate sizes. I changed your centerlines to 0.2.

Best,
~DD