Basic Understanding for AXI WRITE INCR

Hello , 

I am new to AXI protocol. Though I have read the document of AXI , but have some doubts on it. I have made run a write sequence (only from AXI to get the better understanding ) Please have a look at the following waveform.

In this diagram , I have made incr type burst request.

In between I am getting the protocol is generating  awvalid in between , shouldn't it be asserted only once for each time a transaction is made ? 

Please help me out here ? Am I missing something.