No-IP interview questions

The initial interview for Fullstack Developer was fine. I spoke with the head of the team. I felt that we got along quite well. I was told that I looked like I was a good fit. However, in the end, they did not go with me. That was fine. It wasn't clear why they didn't pick me but that's just the way it goes. A few months later I applied to the Front-End Dev position and was contacted with interest from HR. We spoke in an initial phone-screening exchange. I told her I had also applied to the Fullstack Developer position and after hearing my qualifications she suggested that I continue in that direction (as opposed to what I currently was applying for, which was Front-End). I felt happy because, again, it was never clear as to why I wasn't picked for the first position. The conversation ended with her informing me that she'd try and setup an interview with me and the dev team. I thought, "awesome, I'm getting another chance at this position." About an hour later I received an email from the HR lady saying, "apparently you've already applied - I don't know why you didn't mention this." I felt like she was accusing me of misleading her. Why would I want to waste my time? Has anyone ever 'snuck' into a company after being told in no uncertain terms they weren't qualified? Ridiculous. I told her sorry for wasting her time and thought that I had made it clear that I had already applied for the Fullstack Dev position in the past and that this time I was applying for a second position. She accepted my 'apology.' I then nicely asked her what the team had said was an issue with my qualifications as I had, now, two times been contacted with interest from No-IP's HR department. She never responded. That was okay. I honestly forgot about it as I am happily and fully employed. However, today (about two months after the last mentioned exchange) I received an email saying, "We've reviewed your application. Sorry you're not the right fit," from No-IP's HR department. So, now I'm writing this review. Granted, this was a miscommunication. But it also highlights what I presume is the company's issues with communication internally so I probably dodged that one. To be fair, all exchanges were cordial but at the end of the day I was left feeling unclear about what my lack of qualification was. I also was made to feel like I had done something wrong by re-applying six months after the first attempt. You will likely have a better experience here than me. Maybe this experience was totally random and coincidental. But, if not, there is an issue with the hiring process regarding communication.