No, it says soccer was used before the "singular word" football, but it was still orginally football. In fact, it was actually football (the singular word) even earlier, but in that time the word referred to many different sports.
"...in the early days of the sport among the upper echelons of British society, the proper term for the sport was “Soccer”. Not only that, but the sport being referred to as “Soccer” preceded the first recorded instance of it being called by the singular word “Football” by about 18 years. This happening when it became more popular with the middle and lower class. When that happened, the term “Football” gradually began dominating over “Soccer” and the then official name “Association Football”."
thus proving my original point...
It was referred to as "association football", then "soccer football", then "soccer", then "football", so to me, it is pretty clear that "football" is really the orginal name.