When you upload images, please remember to categorise them as well. With your recent uploads, for example, you want to insert categories "Mary Poppins images" and "Images from movies".
There is a clever way to upload images and categorise them at the same time. First go to images and click on "Add New Image". Select the file you want to upload, and before you click on "Upload Photo", click down "More options" and inserst the code for categories in the "Caption" section.
[[Category:Mary Poppins images]][[Category:Images from movies]]
Try uploading your images this way instead of uploading them directly to the galleries. Here is also a neat trick. Upload your images backwards. Like, upload the last image first and work your way down to first image.