Steps to reproduce:
Create a new Word file
Add a new Table Style, called "Scroll Table Normal"
For this new style set the font size for "Whole table" to 9pt and for "Header Row" to 11pt
Upload word file to a Scroll Word template
Create a new Confluence page and insert a table with a header row and some normal rows. Add text to each column
Export this page with Scroll Word Exporter with the earlier template
*Note:* this does not only affect the font size but also other properties, for example cell paddings.
Header row in exported Word file has font size of 11pt
Header row in exported Word file has font size of 9pt