Hi Kenny,
When using the # table structure, the table will always be stretched across the whole width.
The only way to avoid is, is by making use of the table structure without the # sign. That will work fine.
More info on different table structures can be found here: CASE: different table structures.
If this would only need to be applied in PDF export, you can of course make smart use if ic tags so the table is not spread over the whole width in export.
Hope this answers your question!
Kind regards,
Robin