Hi Matt, I tried your link and it was downloaded as follows 07*********9_151113.csv! This looks like a spreadsheet of some sort and it used to be a .pdf, which I would prefer!But at least it is downloading as something that is recognised!
Glad to see you've got hold of your bill now. I cant really explain the email to be honest. Have you checked your private messages? There may have been a post that the moderator had to remove which would have generated an email.
Thanks for the response Stephen_B, that may explain why I got the email! I still have not had a suitable answer regarding why I received a download with an unknown extension, nor why I'm now getting a spreadsheet looking download, (.csv) instead of a .pdf, which is what I used to get and would prefer to get in the future!