Michael on "Home page sidebar is missing"

On my site's homepage (jerrymomoda.com) the sidebar has moved below the main column (two-column site). I've tried deactivating/reactivating all widgets, without it fixing the problem. I've tried installing new themes, and the sidebar appears as it should. But I like the theme I'm using, except for the sidebar issue. I'm using a Pagelines Platform theme. This problem exists in Safari, Firefox and Chrome browsers.

I don't know how to fix this. Please help! Thanks.

try validating your site at https://validator.w3.org/nu/
It's possible you have some open tags.

- Unfortunately, your currently used theme is not in the wordpress.org/themes/ directory:
https://wordpress.org/themes/search/Pagelines%20Platform/

- These forums are for free themes available in the WordPress theme directory at wordpress.org/themes/. So if markup validation does not help, please contact the developer/vendor directly for support with your question. You'll be more likely to find a good answer from them, for they have the access to its code. Forum volunteers are not given access to commercial/custom products, so they would not know why your /custom/commercial theme or plugin is not working properly. The developers/vendors are responsible for supporting their custom/commercial product. See http://codex.wordpress.org/Forum_Welcome#Commercial_Products

Thanks for your suggestions. Troubleshooting by validating looks above my skill level. I haven't changed any code to the theme. Would open tags in a post affect only the homepage and not child pages? I've tried contacting Pagelines Support twice, but no response.

I think it's time to try new theme. Thanks for your help.

Would open tags in a post affect only the homepage and not child pages?

something seems to be cutting through html tags in the process of creating the excerpts; if you are not using any plugin to help with the excerpts, then it is likely some code of your theme that does that.