After republishing your Dendron web-view the old content might still show. YAnd you might have to run Hard Reload. You can see hard reload option in chrome when you activate the Inspect view.
{max-width: 500px, display: block, margin: 0 auto}
{max-width: 500px, display: block, margin: 0 auto}
To test
This might work as well:
rm -rf ~/Library/Caches/Google/Chrome/Default/Cache/Cache_Data