Custom Field issue

I’m having an issue when trying to use Soundcloud Is Gold to insert players into WordPress custom fields. No matter what I do, the shortcode gets inserted into the main content editor. I can copy/paste it to my custom field, but that’s cumbersome.

I’m using a WYSIYG custom field so it has a “add media” button. I click in the custom field, the click the “add media” button, go through the normal steps to insert a Soundcloud file, and it shows up in the main content editor instead of the custom field.

This doesn’t happen with other media types (like images) only with SoundCloud is Gold.