Check out Tuesday’s post on what happens when you’re not in control.
Now for the lessons of that post.
Philip Koch nailed the primary lesson in his comment (and these are my words): You won’t always have control over your marketing material.
If you’re showing at spaces other than your own, the venues are going to be the ones in control. Get Zen and release. You can give them as much input as they will listen to, but then you have to let go.
People who receive flyers and invitations from organizations understand completely that it’s the organization that hired the artist and it’s the organization that created the promotional piece.
Other comments suggested a remedy that’s spot on: When someone screws up, you take charge. In truth, you should be in charge from the start since you should never ever ever leave it up to any organization to do all of the marketing for you. They do their part and you do your part. Make sure your contacts get the promotional piece YOU want them to see. This means you build that expense into your budget.
No one can promote your work better than you, so don’t expect them to.
Having said that (and I certainly don't know what took place in this instance) I fully believe that face-to-face meetings and agreements can alleviate some of the problems that occur in artist-venue relationships. An article I wrote about building trust with galleries might help explain how this would work.