It sounds like you're experiencing some issues with the Webflow Lightbox element on your Gallery page. Seeing an old image displayed multiple times and inaccurate positioning of the lightbox images can be frustrating, but there are a few suggestions I can offer to help you troubleshoot and resolve these issues:
1. Clear cache: Sometimes, cached data can cause unexpected behavior. Clearing the cache on your browser before testing the website can ensure you're viewing the most up-to-date version.
2. Check group names: You mentioned that you've already tried changing the group name, but it's worth double-checking to ensure there are no conflicting element names or class names in your project that might be causing the issue. Make sure that the group name you've assigned to your lightbox images is unique and doesn't match any other element names or class names.
3. Review lightbox settings: Double-check the settings for the Lightbox element. Ensure that the source images are correctly linked to the lightbox and that the image elements have the correct data attributes associated with them.
4. Image source: Make sure that the image files you're using for the lightbox are up-to-date and properly linked. It's possible that an old image is still being referenced in your project, causing it to appear multiple times.
5. Positioning and sizing: Inaccurate positioning and sizing can be a result of conflicting CSS styles or positioning settings. Check for any custom CSS or conflicting styles that might be affecting the lightbox element, and make sure it's set to display correctly on different viewports.
6. Test in preview mode: Use Webflow's preview mode to check if the issue exists outside of the editor. Sometimes, the editor might display elements differently than how they appear when published. If the issue persists on the published site, it's more likely a problem with the implementation.
7. Check for custom code conflicts: If you've added any custom code or third-party integrations to your site, it's possible that there could be conflicts with the Lightbox element. Temporarily removing custom code or disabling integrations to isolate the issue can help identify the cause.
If none of these suggestions resolve the issue, I would recommend reaching out to Webflow support or the Webflow community forums for further assistance. Providing specific details about your project setup and sharing the read-only link to your project can help others diagnose the problem more effectively.