As I suspected, the issue isn't due to Quark displaying extra Comment fields, it's due to the Events Calendar Plugin adding in extra Comments section.
You can tell this simply by looking at the code produced on the events page, using either Firebug (for Firefox) or Chrome Developer Tools (for Chrome). Instead of letting the theme handle the display of the Comments section, they're calling the Comments template themselves and adding it in as part of their own content. They definitely shouldn't be doing this!
Anyway, the correct way to fix this is to create your own template. I'm presuming that the only reason you've chosen to use my Front Page Template is so that it will also display the widgets on the page. This Front Page Template should really be left alone, rather than modifying it for your events, as it's a specific template for displaying on static homepages. The best way to do what you want is to select the Default Events Template for the Events Template option on the Display tab of the The Events Calendar Settings page. You then create your own copy of this template, which overrides the one that comes with the plugin.
I've created this template for you and I will send it through to your email address. You simply need to create a tribe-events folder in your Child Theme folder and then add this new template. I've already changed that option I just mentioned, on your site so it should just automatically pick up this new template when you add it to your site.
There are numerous benefits for doing it this way:
- It leaves the font-page template for what it's intended purpose is (ie. for displaying a static front-page)
- It gives you the flexibility of changing the events page however you want
- If you want to create separate widgets for displaying on your events pages (instead of using the same as the front page), you can. You just have to define the widgets and add them into the template.
- It's just proper way to do things.
You can find out more about overriding their templates on their documentation pages - http://tri.be/support/documentation/events-calendar-themers-guide/