Re-emergence of Widget Visibility Problems

The right widgets were showing up on the right pages of my website before the holidays, but now they are not. I have the same widgets on every page, whether I want them or not, and some don’t appear anywhere. I’ve read the older posts and responses on the support forum and tried some of the tricks suggested, but the functionality has changed, and anyway, they’re not working for me. Site is: https://www.vweisfeld.com and uses 2011 theme.