Hi,
I’m not familiar with that theme so I don’t think I can do anything with the hook system, but I’ll be happy to take a look to see if there’s some other error. You can send your details through the contact form.
The plugin doesn’t substitute the post title or link the title for map POIs – only for mashups (where multiple posts are involved). To add a link to the title for a map POI you can use the map editor to set an anchor in the title itself. For example:
<a href='www.myblog.com'>Title</a>
Perhaps a workaround without using the hook system might be to use a separate template for the home page? Then you could just insert the mashup with do_shortcode() (see the documentation for examples).