Complex sentence: It entered at number one with about 9,200 downloads, which was considered as disappointing, then directly dropped to number 17, which is the biggest drop for a number-one on this chart.
Split into simpler sentences: It entered at number one with only 9,200 downloads, which was considered as disappointing. The following week, it dropped to number 17, which is the biggest drop for a number-one on this chart.