I apparently misread this situation but I don’t understand how?

I downloaded an app called pure, which is basically an anonymous hook up app. Its entire purpose is sex. I matched with this girl, and we ended up sexting the first night. I had told her to always let me know if she is ever uncomfortable or if it goes too far and we’ll dial it back or stop. She wanted to talk on the phone and maybe play some video games online to get to know each other first before we met. And I agreed, we get on and things seem to be going well. We are flirting and having fun, and she wants to switch games but I had to download it first and it was going to take an hour.

She says I’m not like what she expected off of that app. While waiting for the download, we had been talking sexual history and she asks “so what do we do now?” and I said “we could pass the time like we did the other night” and we are flirting back and forth and I start talking like I did when we were sexting and she abruptly says “we are not on the same page” and hangs up. I text her and ask if everything is okay and that I’m sorry if I made her uncomfortable. She said I didn’t make her uncomfortable, and she asked about the download. We ended up playing the new game that night. No more sex talk. And we had fun and she goes “I like your vibe…. so what next? I think we should meet up” and I agreed and she fell asleep on the phone.

She texts me good morning the next day, and I respond but she doesn’t respond at all after that. Hours later I ask how she’s doing and she says she’s having a mental breakdown and is not doing well. I ask if she needs anything or just needs time alone. And she says she’s sad. I ask why, and she says my tier system doesn’t work. At the time I didn’t know what that meant. And I asked what my tier system was. And she didn’t answer and just said “I’m out”. And I was so confused at this point, and we had a series of exchanges that was very bizarre. And she went to sleep. And I just don’t know where I went wrong, I thought we were on the same page?
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I guess my tier system is broken because I was on there to hook up but I also was trying to comfort her? I’m not sure…
I apparently misread this situation but I don’t understand how?
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