Losing Character Styles When I update Linked Spreadsheet on InDesign
I have a 56 page price list that I am updating. I have linked the SpreadSheet into InDesign, putting it in unformatted and then adding the Table and Cell Styles that I need for the design. Each time I update the Spreadsheet with different prices however the Table and Cell styles remain the same BUT the Titles and Subtitles which have specific Paragraph/character styles seem to disappear when I update the Sheet! See example below
BEFORE UPDATE
This version has the titles with the specific Styles I added like I need them to be:

AFTER UPDATE
This shows after I have updated the Spreadsheet, the Cell and Table styles remain but the Paragraph and Character styles added to just the titles have disappear and the text is in the same style as the body text:

There are over 100 titles/subtitles in this document and I don't want to reapply the character/paragraph styles to them each time that the excel file gets update, what is the solution to this??
I would be very grateful for help on this

