I'm applying for IM and most programs ask for three letters. I did a research year so I will have an extra letter that I would like to submit. All of my letters are uploaded except the Department of Medicine letter (will take several more weeks). My question is if I assign my LORs now and programs download them, will they not download my Department letter (required by most programs) when it's ready? I'm afraid they will download the three submitted letters and since they only require three, they'll close out my file without downloading the required Department letter (which would be the fourth letter). Any suggestions?