Queen chart positions in USA

I've found a huge dabase of USA TOP 100 single charts from 1950 to 1996 week by week, plus YEAR-END CHARTS:
http://members.aol.com/_ht_a/randypny/cashbox/acknow.html
I was surprised it states that Radio Ga Ga's peak position was No 14, not 16, and re-released BoRha in 1992 made No 1, not 2.
http://members.aol.com/_ht_a/randypny2/cashbox/19840414.html
http://members.aol.com/_ht_a/randypny3/cashbox/19920516.html
Maybe these charts arent equal to Billboard charts, but other data, as I remember, tallies (for example, AOBTD was 4 wks, and CLTCL 3 weeks at No 1, AOBTD spent 34 weeks in charts, Killer Queen's peak pos was No 12, WATC - No 4 and so on)
Any ideas what's true?
By the way Queen in 1980 were really huge in USA, maybe even No 1, according to year-end charts of 1980, AOBTD was best selling single, and CLTCL and The Game No 5:
http://members.aol.com/_ht_a/randypny2/cashbox/1980YESP.html
http://members.aol.com/_ht_a/randypny2/cashbox/1980YEAP.html

Yes, I frequently use this site for reference. This is Cashbox though, and not Billboard, which is why the numbers are slightly different. I believe there are/were differences in the way they calculated data.

A lot of people in the USA considered Cashbox to be the real music chart,especially in the late 70's and early 80's.Although Billboard has always been the "official" chart,it seems like cashbox usually had a better pulse on the market,and what rock stations were really playing all over the country.It's really apples and oranges in most cases,the difference in chart positions usually wasn't too different(2 -5 places).

I see, it is based on how much money appropriate single/album earns, not sold copies as Billboard, isnt it?
Finnaly, it's more favourable to Queen chart positions than Billboard, and that's good