Ask for help: visa annotation

[wontion]

There is an annotation writed 'TRAINING WITH *** FOUR WEEK STAY'.
'***' means my company name.

So is the annotation mean I can stay in U.S. only 4 weeks?

VISA TYPE:B1/B2, Entris:M, Expriation: one year

Thanks a lot.

[immihelp]

You can stay until the date mentioned on I-94 form. However, it is possible that, after looking at that annotation, the immigration officer at the port of entry gives you I-94 form valid only for 4 weeks.

[wontion]

You can stay until the date mentioned on I-94 form. However, it is possible that, after looking at that annotation, the immigration officer at the port of entry gives you I-94 form valid only for 4 weeks.

Because my schedule has been changed, so whether it can be discussed. I mean I show the new schedule and invitation letter to the immigration officer, will it work?