Problem with apply_filters function

I’ve written a plugin that puts the content of any page or post anywhere I want – like another page or post or a widget

I’m having problems with the apply_filters function – it messes things up for me

My code for the plugin is:

function wp_e_post_function($atts)
{
	$post_object = get_post($atts['post']);
	$myText = $post_object->post_content;
	$myText = apply_filters('the_content',$myText);
	return "$myText";
}

add_shortcode('wpepost', 'wp_e_post_function');

The plugin works like this: wherever I put [wpepost post=45], it put the content of page/post with ID 45 in the place

The plugin works VERY well and perfectly!!!

ONLY, in some places – like some themes or plugins, there is a problem
Some of the formatting or functions applied to the rest of the main page content also gets applied

For example, I’m trying to use an ecommerce plugin
I’ve got 3 footers where the content of 3 pages is put

When used with my plugin, the damn shopping basket shows on the footers 🙁

The problem goes away when I edit out the following line: $myText = apply_filters(‘the_content’,$myText);

BUT, then the formatting of the page – simple things like automatic paragraphs are missed out!!

Another example was when I used a twitter plugin, the twitter plugin would also show wherever I used my shortcode to put content from another page

Where am I going wrong?
How can I solve my problem?
Keeping the formatting is really important!

Is there an alternative to the apply_filters function I can use?

Any help would be great

Thanks

Omar