Google Autofill at checkout

So I am running 1.3.5sp2 and I have an interesting issue on step 2 - after step 1 when I enter my first name and last name and email and phone number and hit the continue button

In step 2 section my phone number is going in the first name - the rest of Google autofill is correct - I dont have this issue with other websites when autofill is used, any ideas if something the cart is sending/setting is incorrect?

thanks in advance