Laurinda,
Welcome! Nice stuff.
First, as people are saying here, don't change what the camera captures. In RAW, your image is 5616 x 3744 and captured @ 300 PPI, which is Pixels Per Inch. DPI,which is more for printing purposes, is DPI, or DOTS PER INCH! Confusing, I know. When you open your file in PSE11 and the Camera RAW box comes up, you can see at the bottom, the file size and also the PPI. Same later, in PSE11 and IMAGE SIZE, you'll see the PPI is shown. So NEVER change that, no reason to.
Wait, I lied! You can change that if you're gonna post it for the Web and then 72 PPI is all that's needed, or "seen" by the monitor/computer. So anything that you send to FaceBook or Instagram,etc. should be 72 PPI.
When you save your image, you'll see the box come up that titled "Jpeg Options" and then the slider bar that starts at "12". If your jpeg is over or close to 25 MB, then slide the bar to the left and go to 11 and that should be small enough now to upload to FAA. I have the Canon 1Ds MKIII and it produces the same size files as your camera and this is the way I save my files.
I save my "editied" files as Masters or Fixed, in the original folder and then change the "Mode" of the file from 16 bits to 8 bits, duplicate the file and then save that jpeg as a "fixed copy".
Also, it seems that many of your images have been sharpened, a LOT and you really don't want to sharpen them, except in RAW. If you sharpen to look good on your screen and then upload the image, it may get rejected if the printer thinks it's over sharpened and has "artifacts" in it from the sharpening you did. The printer will sharpen to the size of the print sold, since you can't sharpen for ALL sizes,
Hope this helps,
Rich