I 94 expired for H4

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I am currently in H1B visa in US and my visa expires on  May 2017(initially it was till May ,04 2015 with company x and  extended my visa up on arrival along with my wife and daughter's).

My wife and daughter arrived on April 14, 2014 and while checking the i94 date for my daughter there seems to be an error. My wife's i94 date of expiry is 04,May ,2015 but my daughter's i94 date expires on 04 may,2014. Its already

up on arrival of my daughter and wife I switched to company y and got the visa extended till May 2017.

Mine and my wife I 94 expiration is may 2015.

what should I do now for my child. Please help.