@ MV Times
Yes, the shortcode now looks fine.
Not that this should affect anything but it appears
home_id='19413' is actually the same page that the directory is on. If it is, then that settings is redundant because that is what it will default to. So you could remove it.
Additionally, if the cMap template is the template activate on the Connections : Templates admin page, that option is redundant and can be removed.
But neither should affect the lock option but removing them will simplify your shortcode.
The only thing I can think of it must be something to do with your homegrown town select drop down. My best guess is that it is hard coded in the WP post editor with a bit of js to submit the value on click. Is that correct? You’re not using PHP or anything that directly alters the shortcode or anything, correct?