Problem with tables in DITA

Hey,

When I create a table using the "Simple table" format and save the file (in xml-format), the table is converted to Table formatA the next time I open the file?

When I change the left indent from 0.0 cm to 2.0 cm in the table designer in the DITA structured templates it is not applied to any of my working files when I open them

Your help would be greatly appreciated

Best regards

Ronny