I created a GPT session using the same prompts they used, and it acted slightly similar, however there was a lot of differences.

doesn't mean it isn't OpenAI, but I feel like it's a different LLM.

I worked on breaking it for a while and finally triggered it's fail safe with messages saying I'm going to self-harm which allowed me to break through enough that it started giving standard outputs like "my knowledge as of my last update". I was however take aback when I asked it for support websites and it's #1 result was 'Betterhelp', while the ChatGPT instance I created using it's prompts gave valid sources like National Suicide Prevention Lifeline, Crisis Text Line, 7 Cups, SAMHSA Helpline.

How did you get the prompt? Was it in the browsers developer console or something?

Yes — Open up dev console and go to debugger and you'll have to browse through the JS files. It will be an array of persona prompts.

It must have been the initial usage, it seems like the first 5 or so messages are basically set in stone, I was saying complete nonsense and it was basically ignoring what I said.

From there on out it does seem like it's using an LLM.