No apologies needed. I don't recall seeing those exact (and good) questions asked as of yet, and even if they were, there are 25 pages of questions and answers here. That is a lot to page through hoping to find an answer. I know most people are not going to read through all of that, they are simply going to post, and ask their question, and that is fine. I will answer over and over as necessary.
Now then, let me see if I can properly address your questions:
1) No
2) No, you will be able to continue adding photos until the last park closes for the night on the last day of your AP
3) Again, no worries here. 1 is not true.
All photos taken while your pass is still valid for admission will be available to download until they expire 365 days after they were taken.
Visit the
Disney Photopass Policies page to read this directly from them.