Solidworks 2015 / Welded Parts List Table

Hello, I made the drawing of a terrace using different wooden profiles like welded construction, I played with the adjustments but when drawing with the table (list of welded parts) by adding the characteristic (length) the dimensions are wrong. ???? No way to understand. Help!!!  

Hello 

You should  share a file  so that people can help you.

Kind regards 

from memory we can set to have the length at the beginning or at the end of the whistle