Palantir Technologies Engineer, Developer Support Team interview questions

First a phone call with a recruiter. Then 2 phone interviews. The recruiter was nice, simple questions about why I wanted to work at Palantir and then a question involving a binary search. First phone interview asked a simple algorithm question to identify if all the characters in string1 could be found in string 2. Then asked a troubleshooting question. Second phone interview asked for a function to find the minimum value that a program can hold without rounding down to zero. Then he also asked a troubleshooting question. The second technical interviewer was either rather unintelligent or very very inexperienced at interviewing. He phrased his questions weirdly and made mistakes; I'm not confident he even understands why what he said was wrong and stupid. He handled the entire interview weirdly. I got both the algorithm question and troubleshooting question correct and no offer - I think he really understood very little. Also, not sure why they need a Recruiter phone screen and then 2 technical phone screens. The last guy was very unpleasant to talk to and clearly did not come to the interview prepared. He called late and spent the first 5 minutes shuffling through something to find questions.