School Forget To Send My Acceptance

During one of my interviews in September, the admissions team said they would release acceptance decisions in roughly 4-6 weeks. 10 weeks had gone by without hearing anything, so I messaged them to inquire about an update. 2 hours later, I got my acceptance email, and the person who interviewed me apologized and said there was a glitch sending out my acceptance. It is quite funny that such a life-changing decision had a clerical error that delayed it by almost 2 months. Has this happened to anyone else? I am very grateful for the acceptance, but it is sort of mind-boggling that stuff like this can happen.