TCA7408: Read from Register

Part Number:TCA7408

Hello,

Our customer evaluating TCA7408 and they have a question.

About Read From Register (Figure 12. of the datasheet) ; 

To read register from TCA7408, we have to send the slave address twice.

And the figure shows that it is not required start condition before sending second slave address.

However, they inserting start condition before that because they think this is an procedure based on the I2C standard.

Please give us your advice whether there Is any bad influence for the device behavior  with their usage.

Thanks and best regards,

Hiro