Comments and Posts RSS going to same address

I use Feedburner to manage my feeds, with the latest version of the plug-in. I also use the Latest comments and Latest posts widgets in the K2 theme.

My problem is that the two Subscribe links in my sidebar — to Posts and to Comments — both seem to point to the same place.

I had a little poke around to see where the widgets get their information from, but I cannot see a way in WordPress to change the details of where the feeds are.

Any suggestions gratefully received.

Feedburner also seems to be generating an error from https://agro.biodiver.se/wp-commentsrss2.php but I think that is a separate issue.