One possibility, without differentiating between an X, Y and Z receiver, is the staff has three WR spots available and the top 3 guys on their board are all considered #1 targets/#1 at position because all three fit the spots available.
For example, do you think they told Quentin Nelson he was the #1 target at OT and Bars he was the #2 target, or vice versa? Probably not. They were probably both #1 targets/#1 at the position because we were taking two tackles and those were the two guys we were recruiting the hardest (after KC picked Miami).
So, #1 targets at WR are Holmes, Dupre and ????, in no particular order.
I don't know. Just throwing that possible explanation out there.