Font handling for multiple font file types is broken: if a given typeface represents weights using font files of different types, then different parts of InDesign will handle the font differently. Nowhere will it appear as one family with all weights below it. Because the presentation of the problem is significantly different between InDesign subsystems (paragraph style setting and setting font from the tool bar, for example) this might indicate refactoring is in order to ensure all subsystems handle fonts the same way.

See: https://plus.google.com/+BradMurray/posts/7e3o7Jq2hcH