Definitely agree with your perspective on the RPO. If all other RPO collaborations have been treated the same in the Billboard Classic Album Chart. This would be why the Carpenters RPO album has been classified this way too.And as was said then, probably anything from the RPO is automatically classified as classical.
Upto a few weeks ago the Beach Boys RPO was also on the Classical chart.
“As Time Goes By” hit #18 on the Japanese charts and was certified Gold in October 2001."Voice of the Heart" achieved Gold in the US and UK. "Old Fashioned Christmas" achieved Gold in the US. "Lovelines" did not meet the Gold threshold but did reach #73 on the UK charts. "Yesterday Once More" achieved 2X Platinum in the US and Platinum in the UK. "The Singles 69-73" was the Carpenters best selling LP going 7X Platinum in the US and Platinum in the UK and Canada. "The Best 22 Hits of the Carpenters" was the top seller in Japan achieving 12X Platinum as a limited release keeping in mind that units sold to qualify as Platinum in Japan is far less than the million necessary in the US.
|Album: Gold: Greatest Hits|
#224 United States
#453 United Kingdom
#126 Papua New Guinea
#199 Hong Kong
#1078 United Kingdom
|Album: Carpenters with The Royal Philharmonic Orchestra|
|Album: Singles 1969-1981|
https://www.riaj.or.jp/riaj/open/open-record!file?fid=675^^I searched the RIAJ database and I am unable to locate that certification of Carpenters,
As Time Goes By.
Could you post the link/reference to the certification ?