Our schools's principal is extremely busy with the students before and after school, at recesses and lunch, in meetings with the district and superintendent (and unless you have experience working with the school district you have no idea just how many meetings are required) and staff throughout each day. The office staff (one secretary and 2 part-time assistants) will handle phone calls, she doesn't. She also doesn't have time to check her email, least of all reply.
She DOES make taped-recorded calls to ALL parents at one time to give them pertinent information, and encourages parents to call the office with questions or concerns. We've been getting calls for the past 2 weeks even though school doesn't begin until the 29th, and they are fairly regular throughout the school year.
Unless the school has a budget for a computer specialist or a super computer-savvy staff member with the extra time required, the website might not get updated on a regular basis, ever. One of my grandsons attends a truly awesome middle school in a well-to-do location in SoCal, they have won state awards and commendations, yet their website is still showing LAST year's scheduling and calendar.
Also, having much experience with various schools I will say that typically Pre-K and K enrollment information for the following school year is generally sent home with all students in the spring via flyers, I used to print them in my days as a parent volunteer. It's imperative for you as a parent to go through every single piece of paper your children bring home. Possibly the information you're needing was sent home months ago as details are made many months, if not years in advance.
Realize that the school is more than likely dealing with a million things necessary to provide the best for all students, and need you to reach out for what you need. Call the office, not the principal with your questions, don't send emails as they more than likely will never be looked at or returned, read everything that is sent home from school with both of your daughters.
And volunteer. I worked full-time as a single parent and volunteered in the classroom, in the office, put together homework packets at home on the weekend, coordinated and worked fundraisers, was HMO (Home School Organization, not part of the nationwide PTA/PTO organizations so monies earned could stay with our school) president for a few years and HMO secretary for another few, I did what needed to be done, whenever. It opened my eyes tremendously, and I realized just how much schools have to deal with, even just on a daily basis. It actually worked out that I became a liaison of sorts between the school and the parents, as there were parents who couldn't understand why things were done (or not done) the way they were.
Join your PTA, PTO, HMO, whatever your schools call them, and get involved, voice your concerns, ideas and suggestions at the meetings, and ask how you can help. Parents need to work together with schools for them to be successful.
Hope this is a great year for both of your daughters!