The best way to keep track of your submissions is to use your My Results list. Here is a link to instructions for it:
Once you are looking at your "My Results" page, you can choose to see all the results in the upper left corner, sort by any of the columns by clicking on the column header or search for a specific submission using the search window on the right side.
You may need to resubmit it if you do not see the specific one you are looking for (if you click on each one and select Work from the pop up menu, you can see what was submitted). Also, you can tell it has not been assessed if there is no score in the right-most column.
If you see a lot of redundant submissions, these can clutter the submission list, so I recommend withdrawing the unassessed duplicates by using the steps outlined here:
Please let us know if we can be of further assistance.
Things to be aware of ...