OK, I think I see what you mean. I've set it so that the recordset is now being filtered (I think). The SQL from the advanced view of the recordset now reads as follows:
SELECT *
FROM opMrecordings
WHERE recordingArtistID = colname
ORDER BY recordingArtistID ASC
When I test it though I'm getting a blank page with a URL ending like this:
recordingsResults.php?id=4
This is probably really frustrating for you, apologies - it's been a long day here (just after midnight in UK) and I've spent ages trying to get this sorted.