I did not find any help with this, so I’ll make a thread for anyone who is having the same issue.
I want to record in Roblox Studio at a certain resolution, but it shows an incorrect resolution size.
And the problem is probably due to your display settings; the scale has to be set to 100% for it to be accurate.
And on top of that, I had the issue where I could not set the Calibrate Device Scaling correctly because I could not adjust it any smaller.
All these problems were fixed when I changed my display scaling size to 100%, not 175%.
So if you are recording, I recommend you change your display scaling size temporarily to 100% if you need the resolution to be accurate.