Yes you provided a possible workaround. I implemented the workaround by removing the resize output option from the primary upload behavior component. I then created another upload behavior component that performed the resizing function. Both of these file manipulation uploads are keyed off of the single form field.
<input type="file" name="photo" id="photo">
The test file worked as expected on the "WA_UploadResult1" by uploading a full sized image that was not resized or compressed.
The second file upload component "WA_UploadResult2" failed to send the resized image completely. The thumbnail file was not stored along with the full sized image as expected.
Your recommendation has achieved the clean up on the full sized file upload, but I don't have the automatic thumbnail that I need to obtain.
So to answer your question. No the workaround did not work completely.