When I press down on my fretboard(let's say 50% pressure is lightly and 60% is normal or a little harder for example)with 50% pressure it sounds fine but if I put 60% pressure it sound completely different and if I go back and forth quickly from light pressing to fairly hard it sound like I'm bending the note but I'm not I'm just pressing down straight. I hope this makes sense. Does anybody know why?
This is probably caused by the frets being higher than normal, and possibly in combination with very light-gauge strings.
A higher fret allows more room for "downward travel" towards the fretboard. This basically allows you to "pull" on the string which alters the tension of the string, causing a pitch change. This is what the tuning machines do, and it is, essentially, a bend.
Light gauge strings are more susceptible to this. Most guitars do this, but usually one has to try to make it happen.
You can try changing to a heavier gauge, but if that does not help, it may be advisable to have a luthier take a look at the frets (fret dressing) and the setup.