The file names will be going back to having the correct file names once all files have been transferred to S3. So in about a week or two this will no longer be an issue. While the files are in transition the numbering system is in effect. 

For a temporary fix for this, the programmers have added the ability to download from our server, which is the zip file name you see in your order as you are accustomed to. The other links says Download from S3..that is the file that will have the numbering system name. So if you do not like the number or generic file name, for now please click the area that has the full zip name to download. :) 

The file downloads are completely safe and there is no reason to worry on that issue.