My inlaws arrived 9/12 on B2 visa. At port of entry, my fatherinlaw was given I94 for 3 months and my motherinlaw for 6 months. in the UCIS I94 website, both of their "Admit until Date" is showing for 6 months. Now my question is, can my fatherinlaw stay for 6 months based on USCIS I94 website or 3 months as stamped in his passport? what if he stays for 6 months, will it be considered as overstay? responses appreciated.