Your CS is 2, so you have access to 10 submissions this week. There's a soft limit of 3 per day, just to save curators from themselves :) You can check back in tomorrow and submit more.
As for rejection message, it was in our roadmap, but since Curie is in downscaling mode it makes no sense to invest in development etc.
Ah, I see. Thanks for that info. Guess I need to do more reading. I've encountered some more errors today, something to do with the author already being proposed, haha. Someone beat me to finding them. :D Hard to multitask while at work.
Thank you for this amazing opportunity.