Still a member? [opgelost]

I am having a hard time contacting a member who I'm in the middle of a swap. His profile looks normal. But when I try to contact him, I am told he is no longer a member! He received a positive feedback from a swap yesterday. What is a way to verify his membership?

Has he left just today and was still here yesterday?

Apparently so, I would post his Numista's name, but I'm not sure if that is permissible.

Seems to be working today. The computer was adding an "a" with a umlaut at the end of his sign in name. Not sure if it was the system or my computer.

I had difficulty this past weekend with the entire Numista site. Gateway errors among other anomolies but suddeny cleared itself up. Not sure what that was about but maybe he is / had similar issues.

Numista was largely down and full of bugs recently. Probably it caused also this issue.