The place for regular Steam discussion is http://steamcommunity.com/discussions/ I'll leave this open for now but it'll get closed eventually.
Ok thank you for the pointer. Sorry for wasting your time by using the wrong reporter.
Nothing extracted yet.
This is not an issue with the client, but I could not find a place to report this anywhere else. Steam links you to the old PayPal site experience (with the orange theme). This requires you to login twice to PayPal (one time in the old experience, which redirects you to login again with the new experience (blue theme)).
Steps for reproducing this issue: