Accuracy of the charts ?

[Albator]

I'm working on tracking Diana in the various charts, and I realize how different they are

GETTIN’ READY FOR LOVE	CB	B	RW
	15	13	12
October 29, 1977	85
November 5	79	82	83
November 12	69	53	72
November 19	60	43	69
November 26	50	41	65
December 3	49	39	62
December 10	46	35	55
December 17	43	33	49
December 24	38	29	44
December 31	34	-	42
January 7, 1978	33	27	41
January 14	32	27	44
January 21	41	55	72
January 28	52	67	82
February 4	76