If you are using a shortcode inside another shortcode and the innermost shortcode is not working/filtering then do the following tweak to alter the eStore's shortcode filtering priority and see if it helps (changing the filtering priority helps one shortcode to be processed before the other one):
1. Open the "wp_eStore1.php" file and search for the following line of code:
add_filter('the_content', 'do_shortcode',11);
2. Once you find it replace it with the following:
add_filter('the_content', 'do_shortcode');
Now try it out and see if the nested shortcodes are all working.