[Pluigin: WP BUSINESS DIRECTORY MANAGER] Tag Field Bugginess on Edit Listing

I’m having another issue that seems like an actual bug. If I submit a listing with no tags, it works/displays just fine. If I go back and edit that listing, the I get the following errors right above the Tags text field:

Warning: Invalid argument supplied for foreach() in /home/*****/public_html/wp-content/plugins/wp-business-directory-manager/wpbusdirman.php on line 2551

Warning: end() [function.end]: Passed variable is not an array or object in /home/*****/public_html/wp-content/plugins/wp-business-directory-manager/wpbusdirman.php on line 2557

Warning: Invalid argument supplied for foreach() in /home/*****/public_html/wp-content/plugins/wp-business-directory-manager/wpbusdirman.php on line 2559

It’s not happening on the page where I first submit a listing, and it’s not happening when I edit listings that already have tags associated with them. I have my Tags field set up as follows:

label: Tags
type: Text Box
association: tags
validation: missing (tried leaving this as “select option” as well)
options: —
required: no
order: 5 (out of 5 total fields)
excerpt: yes

Also, on the Manage Listings page, all posts that DO have tags are displaying like this:

Tags: Tags: tag1, tag2

The bolded “Tags:” is linked to the single posts’s page, and the bolded “tag1” is linked to the “tag1” archive as it should be.