Contact form fields display order on mobile incorrect

Hi,

I created my contact form 7 Form with 2 columns

Firstname Lastname
Address City
Province Zip Code
Phone # Email
…

When I publish the form and check it on a cellphone, I see the fields in that order

Firstname
Address
Province
Phone#
…
Lastname
City
Zip Code
Email

How is it possible to have the order
Firstname
Lastname
Address
City
…

That means it should be 1st field in 1st column, then 1st field in 2nd column,
2nd field in 1st column, 2nd field in second column, etc…

Thank you in advance (and sorry for my English)