I have been made aware that in some instances Personal Messages (PM's) are being sent 2.3.4 times instead of once. I think this appears to be related to slowness at the time of hitting submit, and the members thinking it isn't working and submitting again. I tried it this morning and managed to send the same PM three times, by hitting submit more than once, in quick succession.
So if you received multiple copies of a PM, my apologies.
Please, if the site seems to be running slow, temporarily, once you hit submit, please just wait, or you may end up sending several copies of the same PM