The Format values are also located in the Stamp Manage Catalog located on the top of the page such as sheets, plate blocks, line pairs, PNC strip of 5, First Day Covers, etc.
This happens periodically and occurs when the server volume needs to be adjusted by adding more space for backups. This should be corrected by ADMIN in due process, probably after the holidays. This has happened to me about 4 times.
I use my actual stamp collection. If Stamp manage does not have an image for a particular stamp and I do not have a copy to scan, I may copy and paste it from various sources on the net.
Scott uses multiple entries for a single stamp. It uses additional letters to describe varieties such as in Telegraph stamps: 4T2a horizontal pair, 4T2b vertical pair, 4T2c imperforated pair. Sometimes they use letters to describe color variations, thick papers, etc. etc.
I make multiple records (add sub variety in the stamp data manager) for each copy and add letters after each Scott number to represent the variety, ex. fs full sheet, pb plate block. Then select the format in the general section of the program as it pertains to the specific copy. Works for me.