The number you quote are to get the site from the Proposal Stage to the Commitment stage.
To launch into beta you need to get to 100% commitment
The commitment score is the minimum of three scores:
at least 200 committers in total
at least 100 committers with 200+ rep on any other site
100% commitment score, based on committers' activity on all other ...
From a quick look at your example questions and Cognitive Sciences' help center, it's clear why the two proposals were thought to be duplicates. The help center on CogSci says that:
If you have questions about ...
Psychology (e.g., cognitive, social, developmental, biological, applied, clinical, organizational, etc.)
Your situation seems very similar to another one I read about.
But first, I want to say that "all data permanently erased", "thoroughly deleted", and the entire section about losing the history of the proposal forever are overstatements. It's not gone at all; it's just hidden to everyone with less than 10k rep:
What is a trusted user?
Trusted users ...
The point of the Definition phase is to work out which questions would be on-topic (and which off-topic) before getting started with answering. It's important to figure this out so that from the beginning you can be careful about what questions are allowed and which are not.
Going through this phase has several key benefits, including:
It's a good first ...