Shopify Sr Software Engineer interview questions

I interviewed before with Shopify a few years ago, and had progressed to onsite interview stage. I had nothing but positive experiences with Shopify back then, and the recruiter I worked with was extremely friendly and professional. However, I was extremely surprised at how unprofessional the recruiter I worked with this time around was (different person!) 1. I applied for a senior software engineer role. 2. I heard from a recruiter to interview for this particular role. Was also asked if I'd consider interviewing for a senior SECURITY engineer role. 3. I made it clear that I was NOT qualified for the security role. I have never worked as a security engineer. 4. Asked to do two phone interviews consecutively, one technical and one cultural with the recruiter, ended up having to take half a day off from work. 5. Bit into technical interview, I noticed that questions all revolved around security. I asked the interviewer if I was interviewing for the security role, and the interviewer confirmed this. 6. ... why? 7. I never actually ended up interviewing for the role I had applied for and was interested in. I felt bad for the engineer who interviewed me - I'm not a security engineer and only know basics and high level concepts. It became clear to me pretty quickly that the technical interview was a waste of time for both sides. I'm curious as to why I was forced to interview for a role that I didn't apply for and was not qualified for - and was pressured into taking time off from my current job. If I was asked to be flexible with my time more than what could've offered, the least the recruiter could've done was to make it CLEAR to me which role I was interviewing for BEFORE the interview took place. A no before the interview would've been perfectly fine with me - but this isn't.