Brochure Development & Proofing

Recently, the majority of my time has been spent proofing and reproofing brochures which are to go on press this week. We have an outside agency who develops the brochure (concept, art, photography and copy) and we make final review for approval. The process has been very time consuming and at times, frustrating. Some brochures have been proofed as much as 10 times. As expected, we do make changes to copy or positioning but it is frustrating to find other changes appear when they were not requested. For example, copy disappears when it was there at the previous check, copy changes not requested appear for no explained reason, and files revert back to older versions - all of which require us to proof the entire brochure AGAIN. I am curious if anyone has a better method to the madness.