Hi Brett,
This is caused by CSS on your site coming from, it seems, your theme.
If your goal is to remove the list bullets altogether, you will need to at this CSS to either the bottom of your theme’s style.css file, or the Tribe CSS file you mentioned having; as long it takes effect on the page it doesn’t matter which file:
.tribe-list-widget li {
list-style: none !important;
}
If the is not the bullet at all, but rather just the odd spacing, then unfortunately this is something you should contact your theme developer about. There are custom styles for events classes like .tribe-clearfix that are coming from this CSS file:
wp-content/themes/social-activity/css/cmsms-events-style.css
Those styles seem to be dictating much of the layout and leading to much of the oddness here.
Cheers,
George