Main...."Revive Target"....What?Follow

Maim is an incapacitate effect like a rogue's Gouge, with an added bleed effect. To keep people from accidently breaking their own CC, effects that break on direct damage stop the user's auto-attack. The bleed ticks from Maim won't cause the effect to break early, but an auto-attack or direct-damage special (ie Mangle, Shred, Rake, etc) will break it if they hit. My guess is either that you're missing your first attack, or you have really high lag.

For the record, Maim doesn't have a bleed effect. It does direct damage based on combo points, but the incapacitation effect only breaks on direct damage (caused after the Maim effect kicks in), meaning your Rake, Pounce and Bleed effects (along with all other DoT effects) won't break Maim.

Maim itself doesn't have a bleed effect, though.

Few points I'd like to make...
1) Shred does not appear to break maim. The auto-attack that follows it does, but if you shred-shred real fast usually lag will allow me to get in 2 shreds. This usually involves proccing clearcasting on one of them, though.
2) Maim>Shred does not deal a whole lot of extra damage. However, if you wait until the last possible second to break maim, you come back with a lot more energy. For me, in solo, white damage makes up about 35% of my overall damage. Thus, you get a huge burst of damage for pausing during a time when you don't take damage. Maim allows you to get more damage done per damage taken. However, if an FB would kill the mob, you obviously get more from FB.
3) Maim does not waste all your energy like ferocious bite. If you come back from a stun/gouge/knockback, FB would not kill the mob, but he's got too little health to use rip (which happens a lot on mobs that can stun) you can use maim for the instant damage, maybe use the incapacitate effect, and then finish the mob a lot faster with shred and/or mangle.
4) Maim can work as an interrupt effect. A mob/player healing themselves really ruins your burst damage. When I was 62, I jumped a 65 druid, and by the time pounce wore off the druid was low enough to warrant popping out of form to use regrowth. After my maim + shred, all she could do is try to run away while applying rejuvination or lifebloom. Had I just used FB, she would have probably gotten regrowth off and been back in the fight.
5) Maim can be used to escape or as a psuedo CC. When I'm fighting 2 mobs, especially if one is a caster, sometimes I'll switch back and forth between the two, maiming one then fighting the other. Also, maim can allow you a head start if the fight is not going in your favor, or allow you to pop roots.

There's probably other uses, but in the 5 levels I've had maim that's what I've found.

Maim is decent in pvp when you need to shut down a healer, like a pally. If the healer has full life then it will take you awhile to kill, meanwhile they are healing their teammates (in BG or arena) and make life hell. A good maim before they get off regrowth or HT can make a big difference between life and death. It's not a great move to waste you combo points on, but it can make a big difference in pvp against casters.

your really forget one important thing about maim and kitty form for pve.

Maim gets you x amount of time as a breather so you can regen energy. a 4 point maim gets you 6? seconds = 60 energy so you can use an extra attack. usially the backstab varient (assuming the mob isn't immune to stun) personally I prefer to use the 5 point maim. run behind the mob, attack attack attack, maim, run behind attack attack attack maim, and repeat. You space high burst periods of damage with waiting for your energy to regen.