When do the spindle fibers attach to the chromosome
Your confusion comes from the inconsistent terminology in the literature. The attachement of the spindles to the chromosomes happens in the Prometaphase [1, 2]. The name already suggests that this is not one of the classical phases is cell division, but lies somewhere between Pro- and metaphase. Wikipedia states:


  Prometaphase is sometimes simply included as part of the end of prophase and early metaphase.


If you really need to stick to the classical scheme of pro-, meta-, ana- and telophase, I would personally suggest to treat the attachement (not the formation!) of spindles as a part of the metaphase.