The schools won't mind about the observation hours taken this past June. I took my observation hours around the same time also, up until August before sending in my applications the last week of that month. As long as you've accumulated a decent and reasonable amount of hours. However, it is the quality of the observations that really matter, and this will be evident in your letters of recommendations and/or interest letter.
Having one or two prerequisites still incomplete after sending in applications is just fine. Just make sure you do well in them and send in transcripts after every semester. Also, check with the schools if they will allow incomplete prereqs (and how many) after sending in applications, as this varies among schools.
I don't think there's any harm with adding in your undergrad extracurriculars. Just ensure you specify when.
Best of luck!
Here goes nothing!! I changed my major my junior year and have been completely in love with Physical Therapy ever since. I had a rough semester my first semester of Junior year when I took 4 pre requisite courses and I was not fully aware of the challenges that come with each of them. However, that was a huge learning experience and I feel like it will help me understand the challenges and the major course load that PT school will offer. I am beginning to freak out and I hope and pray that I get accepted somewhere!! I would be crushed if I don't!! Best of luck everyone!!