The zipfile has been prepared with a licensed version of WinZip (and is 124MB - less than half the image-based original) and all files were compressed with a licensed version of Adobe Acrobat, so I suspect the problem might be with your OS. But your post caused me to have a look again and I have discovered what has caused the problem. I simply hit the download button on the original DropBox package, downloading the 293MB file and that is where the problem is. The separately listed monthly issues are individual links to each file and appear to be complete. The zip file activated by the download button links contains the duplicate files, incorrectly dated files, etc. and misses some files. So over the next few days I will prepare the balance files and replace the overall package.