Question concerning availability and delivering.

im wondering.. when it ships, how many does does it usually take to arrive?

and i ordered mine sept 17 available in 2-3 weeks. delivers oct 11-17.

does that mean that the phone should be available oct 1-8 (adding 2-3 weeks to sept 17) then from there, oct 1-8 until oct 11-17 for shipping?

thanks for the answers!