Bulk Import not working correctly - causes SEO Title change and data missing

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So tried updating all my products with Bulk Import as CSV, made not changed to column titles, just wanted to bulk update prices, tags and vendor and now in my SEO title I see the updated price of the product. Am I doing something wrong? I dont want to have to manually go back and adjust the SEO title for every product. Also the Vendor update work but the pricing and tag update did... any ideas why?