1440x900 screen resolution problem

So basically, yesterday I reinstalled a fresh copy of windows 7 64-bits on my computer (a Compaq Pressario SG3750IL) before the reinstallation it was on 32 bits. I downloaded all the drivers and everything, didn't really find any issue but I noticed a problem with the resolution, it seemed a bit odd comparing to how it was before reinstalling. My monitor's native resolution is 1440x900, I couldn't find it on the resolution menu of windows there was either values below or above so for the time being I sticked to the 1366x768 resolution but it just looks a bit off, anyway I went on Google to look for a solution and I found a video where it's suggested to just create a custom resolution using the Nvidia control panel (forgot to mention I'm using a GeForce GT 430 for the GPU) So I did that and created it but it didn't fit on my screen at all and it looked blurry so I just went back to the 1366x768, although I noticed that the resolution I'm setting and the one temporarily showing on my monitor whenever I turn it on and off don't really match, like right now even though I'm on 1366x768, it shows 1280x768 on the monitor status. I provided a few pictures to give a better illustration of what my problem is. Here Thanks in advance, I really hope I'd get to fix this issue.