If they are touching or too close to each other you probably need to put more bow in your neck to prevent fret buzz from occurring somewhere on the fingerboard. After that some frets on each string have a sharp buzzy rattle with no sustain.

I gave the neck more relief, filed the nut, and changed out the strings and the the thing plays like a dream all the way up to the 12th fret. When the string is held against the highest and lowest fret there should be a gap between the 12th fret and the string. When I got it it played like shit, frets buzzing all over the place, open strings buzzing, etc.This is decent intonation tuning for notes between nut and twelfth fret range. Compare the twelfth fret note to the corresponding twelfth fret harmonic pitch with electronic tuner for meter. If the note on the 12th fret is flat, that would mean that the saddle for that string needs to be moved forward toward the headstock.I think a setup is a good idea, but with a low action you're always going to get some amount of fret buzz, t's a compromise. I think it's the way the string conducts the buzz along it's length that's making you think it's the first fret. When you fret the 12th fret, the clearance at the first fret should be the least affected.Neck relief seems good with just a bit of under bow to it. From the 12th fret on up the high E string is definitely fretting out, and to a lesser extent the B string as well, even with the action set at a relatively high 4/64 and change. It can be due to a not correct technique, improper setup, or even warn parts. Done some searching for fret buzz but have not seen this exact problem covered. Buzz in electric guitar strings can take place due to several reasons. Therefore, you need to understand the cause of the buzz and take the necessary steps to get rid of them. You might also be thinking about the buzz that you hear is normal or not.

Buzzing past 12th fret