SITEMAPS: Why does my sitemap have so many sites maps?

SitemapLast Modified
http://expandasign.co.nz/post-sitemap.xml2017-05-31 13:50 +12:00
http://expandasign.co.nz/page-sitemap.xml2019-03-26 16:20 +13:00
http://expandasign.co.nz/galleries-sitemap.xml2015-10-08 15:47 +13:00
http://expandasign.co.nz/products-sitemap.xml2019-02-20 14:41 +13:00
http://expandasign.co.nz/category-sitemap.xml2017-05-31 13:50 +12:00
http://expandasign.co.nz/post_tag-sitemap.xml2017-05-31 13:50 +12:00
http://expandasign.co.nz/product_types-sitemap.xml2019-02-20 14:41 +13:00

This is because Yoast generates sites maps for all things. You can disable them in Search Appearance.