I would say that it is a badly worded clue, if the punctuation is as you say. Using only one comma...
forwarded again, by all sounds of late would be resent (which , sounds like recent {of late})
forwarded again by all sounds, of late would clue to recent
(sounds like re-sent {forwarded again}
with both commas, you could argue either..unless the middle letter is checked against another clue?