why wasn't 'Proud Mary' a single then?

non-top 40 singles:

30/07/1966 Ike And Tina Turner Tell Her I'm Not Home #48
15/09/1984 Tina Turner Better Be Good To Me #45
02/03/1985 Tina Turner I Can't Stand The Rain #57
12/10/1985 Tina Turner One Of The Living #55
08/11/1986 Tina Turner Two People #43
12/09/1987 Tina Turner Paradise Is Here #78