How is this allowed?

One of the colleges I applied to as a safety school is a major public university in Florida. They do admissions on a rolling basis, and everyone I had seen/read about who applied, got their decision back in 2-3 weeks after submission. I submitted everything in November, and just waited and waited while my portal said “received and under review.” Three months later, now February, I emailed my admissions guy at my guidance counselor’s recommendation.

I got a reply from him saying I had been deferred to the spring semester as their starting GPA was 3.7 — the only issue is, my GPA is well into the low 4’s. I was actually hysterical because it’s a good school, but being rejected from a safety school is absolutely demoralizing.

Then I checked again — “Hello carjs, We have noticed an error in your gpa calculation and will get back to you with a decision by the end of the day.” they did not get back to me by the end of the day, or ever.

Even worse, i then got a letter in the mail about my “deferral,” the decision they said was miscalculated. Shortly after I got a letter in the mail about my acceptance with no further correspondence from my admissions counselor.

So they 1. forgot about my application until I had to reach out 2. gave me the wrong decision and even sent it in the mail 3. promised to get back to me by the end of the day when they realized the error (but didn’t).

I wasn’t planning on going to that school anyway but their absolute unprofessionalism even in the time of COVID was sooooo so so off putting. I paid good money to apply and send test scores, AP scores etc. I feel like I’m entitled to a timely and ACCURATE decision, even if it was a rejection. :(( Has anyone experienced anything similar?