First, I don't know more of it myself but I figured out two things. First, you just not do the same barre chords, wich means that with a simple barre chords like F (1-1-2-3-3-1) you can manage to make a B wich is
(1-2-3-3-1-x), so you see that you can manage to make tons and tons of barre chords with a simple F. And two, even though you just keep the same position, if you move up or down, it won't sound the same, so since it's not the same sound, it's not the same root and etc... so it makes a new chord... I'm not sure if you understand but you'd rather go and see the page on acto guitar, especially the video.

So, sorry if I'm just a lost shit

learn that make a e barre the first fret thats f 2nd fret f sharp 3rd g 4th a flat or g sharp 5 a 6th is b flat or a sharp 7th is b 8fret is c 9 is c sharp or d flat 10 is d 11 is e flat or 12 is e minor barre left upthe finger on the 3rd string barre and open a and you have b flat making the barres in the a position man is hard at first it's hard not to touch the first string

There is a book called fretboard logic se which explains things in great detail.
this site has a short but good tutorial:
Guitar barre chords

I have an exerize for that...
its on my lessons

first of all you need to know the notes on the fretboard..
check this page out
http://www.ozzguitar.com/tuning.htm

there are the notes on the fretboard...the F is the first fret note on the low E string.So when you do the barre shape F chord (1-3-3-2-1-1), you are playing the F chord. Now move up one step to the F# position (2nd fret)..now you do the same F barre shape chord and you will get the F# chord..move on to 3rd fret and you get the G chord...you must know the notes on the fretboard to know what chord is produced on which fret..

The index finger acts like the nut or zero fret when you barre. Picture the guitar neck getting shorter each time you barre the index finger. You theoretically "move" the zero fret (index finger) up towards the body of the guitar.

Also, a lot of players tend to use the thumb by wrapping it around the neck. Although I deem this unorthodox, many players do it. Jimi Hendrix would use his thumb, as a lot of blues guitarists. In some circles, it is deemed not correct. However, I've studied classical guitar and yes, that technique is a no-no, in modern and some contemporary music, there are players who incorperate the thumb.