Mine are most definitely old PMS, they are from one particular poster who was kind enough to enquire as to how I made out during Hurricane Sandy (which occurred on Oct. 29!). I am still receiving repeats of her original PMs, even today, Dec. 31, more than two months later. I just ignore them but I'm ignoring an awful lot of technical issues with the new format, and as a consequence I frequent these forums much less than I used to.
So I got a new PM last night, saw it on my notifications, but never received an e-mail notice. Checked and I still have my settings such that I SHOULD get an e-mail for a new PM. Guess if I wait two months, maybe the e-mail will show up?