In this screenshot, Units 3, 7, 12, 14, 15 are missing the arrow to expand/collapse their unit.
In addition, all the segments (e.g. 15-19) of the unit appear together in the resource pane.

Logos Bible Software 7.5 SR-1 (7.5.0.0045) on macOS 10.12.4 (16E195).
It might be a problem with the update to the course last month, as spot checks of a few other courses within the tool all show arrows to expand their unit content.
LLS:LA251FUTATO
2017-03-30T17:29:36Z
LA251FUTATO.logos4
LLS:LA251FUTATOVIDEOS
2016-12-14T21:57:30Z
LA251FUTATOVIDEOS.logos4