If you want to add photos you can organize them by creating different albums for different photos. You go to "My shots" and click "Add album" on the left navigation. Give it a title and fill out the fields if you want to. Hit save.

Go into "My shots" and find the photo you want to edit. On the left navigation find the button "Edit shot". Click it to open a new window where you can change the title, tags and give it a description. Hit save. In order to delete a photo you also have to find the photo first. On the left navigation find the button "Delete shot". Once you hit that button your photo will be deleted straight away. You will get a confirmation for that in a yellow layer, which you can close.

Under "My shots" you will find an "Add shots" link on the left navigation. Click that to open a new window. There "Choose file" and search your computer for your photo. Select it. You can do so up to five times in the same window. If you want to add more photos you have to do it over again. The photo cannot be bigger than 2 MB. Once you selected the photo you can also give it a title and tags in "Show options". You do not have to though. Now select the album that you want the photos to go to. If you do not select an album the photos will go into your generic photo folder. Now click upload and wait until a confirmation appears telling you your upload was successful. Now you can close the window.