ADL5611 different S-parameters


there is a difference in S-parameters listed in the datasheet for ADL5611 and in the attached S-parameters file (*.s2p)

thei is a very big dfference in these S-parameters an the same frequency for instance on 6 GHz the data from the DS is  S11=−4.846 and the data from the file is S11=-7.54962068

What is a right data?

the second question is the data in the S2P file starts from 10MHz while operating freq ragne for ADL5611 starts from 30MHz. is it a mistake?

BR Evgeny