Misalignment and incorrect row width of fields on checkout page

Hello,

I relabeled “company name” and “address” to conform to Spanish formats (“Calle” and “Número”) and put them side by side — FIRST and LAST. The problem is that the alignment is off, one is considerably higher than the other.

And fields like “city” and “zip code” refuse to display next to each other on the same line, even thought they are also set to FIRST and LAST. Instead they occupy full rows.

I think I saw an older post mentioning something similar, but there was no clear answer.

Can you help?

Thank you

https://wordpress.org/plugins/woocommerce-poor-guys-swiss-knife/