Single entry B1 VISA with annotation entering US via other state

[Flying Netizen]

Hi -

I have an approved Single entry B1 Visa with annotation:

Company XX
Cambridge Massachusetts
Nov 2015

This is for a 4-week training in Company XX. Now after the Visa was approved, Company XX decided to move the training to Atlanta GA.
My flight enters US via LA California -> Boston Massachusetts. So my questions are:
1. Can I change my flight to LA California -> Atlantag GA with the annotation I have?
2. If not, what steps do I need to do so I wont encounter issue at POE.

I am now considering LA California -> Boston MA then fly to Atlanta GA the same day or the next. If this is what I do, what problems will I encounter?

 

[USC2013]

Option 1 : You go to boston and get a ticket to ATL ( this is less complicated) boston -ATL is a quick flight.
Option 2 : Change your flight to ATL and get the proper documentation showing training is in ATL.