I think the way to post a user is { user : username } without the spaces so I would write: { user : lighthouses.37 } without the spaces and come up with you: Beacon's Light

To add a note, you need to copy the number associated with your note and then use { note : notenumber }

Use the name that pops up when you mouseover their portfolio (like you are "lighthouses.37" not "Beacon-Shining-On" and I am "sadilou" not "Rhyssa") and don't include any spaces (yes, I said it multiple times).

If that doesn't help (and I'm not sure it will) there's a document here:

https://www.writing.com/main/tools/action/writingml

that can help with most writing.com webpage language issues. It can be found if you look under writing.com tools and Writing ML: Docs and Help