Preview vs. Published Page Discrepancies: Seeking Solutions

Hey - I've use components to build a new page and in preview it looks amazing, but when I publish it there are discrepancies. Some layout elements are malformed, or not displaying correctly, and some positioning is incorrect on the published page (but these are perfect in the preview). Has anyone seen something like this before? Where the preview and the published page don't align? I'm not sure how to fix this since the preview looks great.