I am having difficulty inserting a spreadsheet properly into DraftSight.
Excel: All the formatting is lost, and unwanted blank rows and columns appear.
Works: Only three rows and three columns appear, formatting lost.
try the tbl2cad add-on for excel.
It exports & imports tables to/from the DXF file.
With tbl2cad you export your Excel table to DXF file including formatting as well as including "merged cells"