Hello,
Sorry for the delay. Yes, this is correct - the guidelines have changed. We initially allowed multiple projects, but we revised it to 1 to make moderation of the bundle entries simpler. We also wanted to encourage devs to carefully think about which project to submit. A handful of creators submitted before the guideline revision. These creator's submissions will not be changed (unless of course, they withdraw their entry from the bundle or ask for it to be removed), but going forward the rule may be enforced.
Do let me know if you have any more questions.
- ghosthunter.