BQ41Z90EVM: BQ41Z90 String length issue

Part Number: BQ41Z90EVM

Tool/software:

Hi Team : 

As shown in the screenshot below. 

I read the data 0x0055, I found that the response length is 5 Byte  , but TRM specifies is 4 Byte length .

I read the data 0x0056, I found that the response length is 6 Byte  , but TRM specifies is 3 Byte length .

Could you please clarify how I should interpret these results? Is there an additional parameter or condition that explains the difference?

Thank you for your support.