MKS Instruments Software Engineer Intern interview questions

Very strange and unprofessional. We had a short 30 minute nontechnical interview and a few days later they sent me an offer. I was waiting on pay information for another offer at a different company and I asked if they could give me and my fiancée two days to get more information and make a decision. They said that was totally fine, but when I got back to them they rescinded the offer. Seems they were under heat to get this done ASAP and couldn't afford to wait two days for their first pick.