Placement of Additional Field in Appointments Form

I've added an additional field - Zipcode. I'm finding that it is placed at the end of the line, after the Google Calendar button - how can I control the placement of the Zipcode field? (I've tried turning off Google button display, and then turning it back on, but it always ends up in the same place in the form).

Also, I'm wondering how I can modify the display text for Zipcode - I would like to add a colon after the word to match the other field names (Zipcode:slight_smile:. I know that is normally done with shortcode on the appointments page, but is there shortcode that can target this new field?

Here's a screenshot:
http://www.burntscarlet.com/_test/wordpress/zipcode_field.png