Hi! I took a look at the files. I think I know where the problem is. The custom iProperties G_L and G_W are no longer associated with the parameters because the type has been changed from Text to Number. To fix that, simply do the following.
1) Open the sheet metal part and right-click on the part in the browser -> iProperties -> Custom -> delete the two entries.
2) Go to Parameters table -> uncheck and check export status for the two parameters at the bottom. Basically, you re-export the parameters.
3) Go back to iProperties dialog and you should see the updated Custom iProperties.
Now, it should be updated correctly in the drawing.
To change the paramter format, you need to do it in Parameters dialog, not through iProperties dialog. Right-click on the parameter in the Parameters dialog -> Custom Property Format. There you can adjust the display precision.
Thanks!