Hi @fcis999,
In general, the PayPal field should have been centred. The behaviour looks more specific to your website. Most probably any existing CSS from theme or plugin is changing the behaviour.
Possible to share a page URL where you have the form added so that we can check and advise if there is any CSS that could be suggested?
If you don’t want to share the URL publicly, you can share the page URL via email to [email protected] using this template:
Subject: "ATTN: WPMU DEV support - wp.org"
Message: Ticket URL
Looking forward to your response.
Kind Regards,
Nithin