Yes Lindsey, there is indeed a solution and it is very simple no matter if you are in a single text frame or using multiple ones.
Using Style-sheet:
Create Two Style-sheets i.e. one for the first line in the numbered list and second for the rest of the list and follow the same for each List group.
In the First Style the numbering should start at “1”. whereas
the Second Style will “Continue from Previous Number” mode under the Number Style.
Using Override:
While working on a single style for the Numbered List, Select/keep your cursor in the first line of the number list group and change the “Start At” mode to “1” under the Numbered List options.
Number List Options can also be recalled by Option+Clicking or Alt+Clicking.
The fastest way:
While keeping your cursor in the first line of the number list use Cmd+Click or Ctrl+Click twice, will also do the magic.
Please let me know if these helps.