Hi Lukas! I'm having the same problem right now.
The basic situation: In the past few days I tried to image comet C/2021 S3 (PANSTARRS) on the Deep Elite system. My first action was to set up a dynamic scheduled request (ID: 21279 2021s3_PmIz) a few days ago with the object tracking ON, but the next day I found out that it didn't run. I also noticed that in the ,,altitude'' column 0.00 is showing, and I thought maybe there is an error with the tracking mode and this is why my request isn't running. So I resubmitted it with fixed RA and DEC coordinates (ID: 2021s3_PmIz_ZfIL) hoping that I will get the images (still dynamic scheduled, and I've checked the schedule and figured that it has enough time to run). This was not executed either, so I thought it wasn't the tracking but some other error. I then had to resubmit again (since the comet would move from the fixed location) and set the tracking to ON (ID: 21294 2021_s3). The next day I still had no images even though there seemed to be no problem, and previously I had all my dynamic request executed the night after submission (unless weather or other obvious conditions prevented) so I thought there is somethig wrong with my requests, so I tried to resubmit but this time only 16 minutes total instead of the original 30 (ID: 21302 2021_s3), also tried it with fixed time (ID: 21303 2021_s3f) but neither of these ran. I then gave up on these and figured it will be better to set a fixed request to a few days later when the comet will pass near M9, and then hope that it has enough time to be processed and and will be executed on time.
The problem: Yesterday, when I looked at the dashboard, I was surprised to see that I have the images from one of the archived requests (21294 2021_s3) but I was OK because I finally got the images. The problem is, that today the first one of these also ran, and then it continued with the second (fixed coordinates) one (that doesn't even contain the comet, I will ask for refund for this one). Unfortunately already archived requests can not be stopped, finally I quickly added a fixed time request to image M9 (which I planned to image anyways) to stop the useless imaging. The problem is that now I think it will attempt to execute all those other archived requests in the following night which I don't want (I already have more than enough data on that comet). I also understand that resubmitting a request this many times was not a smart thing to do (will try to avoid in the future, I was just confused this time and didn't understand why it won't run), also sorry for the long text and thank you in advance for help!