That will not give you a definite number. Lets say 20 reserved the name initially, of course all of you start at the $60 level. Until two days before, only eight made bids above the minimum $60, so the BidActivity will show one Bidder at $60 (probably the first one to reserve the name), plus eight other bidders for >$60. So at this point you can only see nine bidders.
Today two more $60 bidders decide to top the high bid, so now you can see 11 bidders. Wait till the 13th, and perhaps the rest of the $60 bidders will join in, and you'll see 20 bidders.