No worries. I'm happy to help...especially if I'm able to improve Optimizer in some way.
I've managed to get hold of the Yoo Expo theme (latest version 5.5.15) you're using for testing on my development environment, and I'm afraid the issue is definitely a conflict with the theme itself. I'm seeing the same behavior as on your site...the trouble is, I've no idea what's causing it.
I'm running in debug mode, and the theme (with or without any active plugins) is producing a load of error messages, including functions that have been deprecated since WordPress 2.0!...so there's bound to be trouble. It was originally written in 2010, so I guess development hasn't kept up with the updates.
Are you particularly attached to this theme, at all? I'm just asking, as you may have trouble with other plugins down the track also. If you want to test compatibility for yourself, you can try briefly switching to either the default Twenty Ten or Twenty Eleven themes, where JW should load as expected.
I'll continue looking into this...but considering all the errors in the theme, it could be anything.
PS. If you want to see the error notices, simply pop
define('WP_DEBUG', true); into your wp-config.php file.