Any text displayed in angle brackets (e.g., <Alias=LocationHold>) is dynamically set by the Radiant Mission system, and will be filled in with the appropriate word(s) when seen in game.
Not all entries may appear in your log; which entries appear and which entries do not depends on the manner in which the mission is done.
Stages are not always in order of progress. This is usually the case with missions that have multiple possible outcomes or missions where certain tasks may be done in any order. Some stages may therefore repeat objectives seen in other stages.
If an entry is marked as "Finishes Mission" it means the mission disappears from the Active Mission list, but you may still receive new entries for that mission.
On the PC, it is possible to use the console to advance through the mission by entering setstage stage, where mission is the internal name of the mission, and stage is the number of the stage you wish to complete. It is not possible to un-complete (i.e. go back) mission stages, but it is possible to clear all stages of the mission using resetquest , where mission is the internal name of the mission.