Gerald.
I had a look at your gallery, and it looks like all your photos are in the gallery home page, not in folders. With a collection as big as yours, it is difficult to locate an image, particularly an airport image, because you have to page through all the aircraft images first.
It would be one heck of a job now, but you need a gallery structure with folders. Below is an image of my home page with the folders down the left side. This way you can quickly jump to the folder and image you want. Images automatically go to your home folder, then you can move them, or you can specify the target folder in the upload screen. You can decide the folder structure to meet your own requirements.
Peter.