Sorting order in Wordpress with advance custom field

Div Truth Elite
El Presidente
Just Getting Started
62
#1634

So I have a ACF called 'track_number' in order to sort each song (CPT) on the album pages (based on their taxonomy).

On the album page I run this loop to get the songs:
query_posts('showposts=20&post_type=song&album='.$post_slug.'&meta_key=track_number&orderby=meta_value&order=ASC');

And for the most part I get what I expected minus one problem, the double digit numbers are jumping ahead (1,10,11,2,3...).

I tried to just put '0' in front of all the single digit fields but it didn't work. Ultimately I'd like to resolve it as is anyways. Any ideas?

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