Uploading… I have Jason, the son of Nya and Jay, Axavar the Orachni, who is from another dimension, and I have upgraded Jason.
All of these characters are from my custom story, Ninjago: The Future Ninja and are not actual Ninjago characters. These minifigures I had to decide the body’s of and your free to guess the actual sets these came from, it’s fine by me.
At a time? Then do that. Select three pictures and wait for them to upload fully, then select 3 more and just repeat until you have them all. If that’s what you meant then no wonder I never had that restriction when I joined.