odyodyodys

Solution:
Leave everything as TEXT only.
Do Not follow that rule if you want to wrap the text.

Do this instead:
Add the following to your functions.php or even better, create a little plugin and do the following

function wrap_readmore($more_link)
{
	return '<div class="post-readmore">'.$more_link.'</div>';
}
add_filter('the_content_more_link', 'wrap_readmore', 10, 1);

This will wrap not only the default “more” text, but also the custom added as <!--more Start Game-->