Rpm and speed bands changing

So I got a 2023 WRX. Second manual but I’m actually learning to drive stick in this one. I’ve made a ton of progress. One of the things I noticed though is that when I first got the car, it would (clutch out) reach 2500 rpm at 25mph in 2nd, 2500 rpm at 35mph in 3rd, etc. But now the speed bands are getting wider and I can drive slower in those gears than I could when I first bought it. Why? Did I mess this up? My first gear synchro is also completely shot and my second gear synchro is on the way out. I only have 1500 miles! Please help!