I also get this on occasion. Since I started doing this over 8 years ago I always keep a copy of the report before I hit the submit. Some MSP systems let you save/print a copy and others let you see a summary, that again you can save/print.
Anytime there has been a question of missing information, I refer back to the filed report and if the info was there, I send a copy of the saved file to the editor.
90% of the time I never hear anything else from the editor, but get the proper rating without reductions. Others I will get a thanks and a sorry they missed it, and a few I will get, wow, I see on your copy you submitted it but it did not come across in our system.
The long and short of it is I have never been docked any points for a missing data request because I had proof it was not missing, unless of course it was and was my mistake, but then I would have the proof that I was in error.
If you are an MS, you must learn to CYA