Weird Submission Columns

Hey,

I am having a look at a few submissions for a form and each entry has a unique column in the admin area with a random string. Some examples: H-v-i-oix-sv-fm-h, A-hdbxu-jji-a-dv-d-yuy etc.

I have WP Bruiser installed to help fight spam, is this the likely cause? The data submitted is often appended with ‘truegecko’ .. Not sure where that’s coming from.

How do I stop these items being included in the submissions? I can disable each random string in screen options, but I don’t want my client to have to do this for every entry.

Cheers,
J