GTA Glitch

So yeah, I got a problem, dunno if anyone else is experiencing this.

Well, I bought a second garage and stored some cars in it, but when I use a car from the garage and leave it outside when I quit/join another session, the car doesn't go to my garage and it completely vanishes.

The only way I can see my car is if I call the mechanic and he brings it to me...
It's so annoying.

Anyone else?

Never heard of this but I have had disappearing cars a few times.