Problem with scale when sheets are copied to Model tab

Hi Guys,

I have a SolidWorks drawing sheet with views of scale 1:1.5. I exported it as dwg format and open in draftsight V1R5.1.

I copied the sheet to Model tab and the dimension remains the same. I save it as 123.dwg.

I have another SolidWorks drawing sheet with views of scale 1:1. I exported it as dwg format and open in draftsight V1R5.1.

I copied the sheet to Model tab of 123.dwg. The dimensions are scaled to 1:1.5. For example, dimension 10mm will change to 15mm.

How do I maintain the same scale when I copied the sheet to the Model tab?

Kindly advise. Thanks alot!

James