A little context, then. At the time, as you said, the Hot 100 Airplay wasn’t an all-encompassing chart, as it only included data from Mainstream Top 40 and Rhythmic stations and was, indeed, based on audience impressions – as it still is. On the other hand, R&R’s CHR/Top 40 chart (which was the one used by both Casey’s Top 40 and the Rick Dees Weekly Top 40) not only used the old playlist reporting method, but their panel still used Rhythmic stations (that separation happened in full by 1995). So it might have been a case of stations over-reporting that song – that happened a lot during the pre-monitorization days. In some cases, there were even what radio industry people would call paper adds – i.e., songs that stations reported as being on their playlists, but which they didn’t actually play. That happened mainly because of label and/or independent promoters pressure.