(1) is no bug at all - it simply is not possible to open a specific note in a new window in the web client. This would make no sense, because there is no note window - it is a browser, and inside of the browser there is a tab with the EN app.
Ok, I understand that wrt to web. But as I said : I noticed this bug in the latest updated app as well, just before it broke. This is what makes me think it's a bug that needs to be corrected in the app too.
(2) My few Penultimate notes open without any problem in the web client. They are read-only, because modifications need to be done in the Penultimate app.
You're very lucky.....mine won't open at all!