Why do I have launch block "end" times which are before my launch block "begin" times?

The planning cycle time (ATO Cycle Parameters » First Cycle Start Time) and the Air Unit launch blocks (LBs) are both relative to Zulu time--and thus, to each other. If an Air Unit’s first LB is earlier than the planning cycle time, the code will interpret that as being at the end of the planning cycle.

For example: If the planning cycle start time is 5, but an Air Unit with three 8-hour LBs (the first of which starts at 4), then the (sim time) LB cycles will appear to be 12:00 - 20:00, 20:00 - 28:00, and 28:00 to 4:00.

Users are advised to align each air unit’s first launch block start time with the planning cycle start time.