We are currently using 7.3.2 so cannot confirm this for 7.4 but you are currect the order they appear is the order they are run.
In 7.3.2 we have dealt this by having just 1 scheduled import and within this multiple import mappings.
It is then possible to drag and drop the import mappings into the order in which they need to run.
We are unable to change the order of the import schedules.
We found a second benefit to having these all within 1 import schedule in that as certain imports can take longer depending how much information there is to come across on different days, the import schedule starts at required time and as soon as each import mapping finishes the next starts which makes the scheduling alot easier as you don't have to worry about an import not finding a related piece of import information.