Your bindings aren't right. It looks like there is a bug in the syntax it uses when there is more than one upload that has more than one version. You will probably have to correct them manually.
You have:
$WA_DFP_UploadStatus["WA_UploadResult1"]["WA_UploadResult1_1"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult1"]["WA_UploadResult1_2"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult2"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult2"]["WA_UploadResult1_2"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult3"]["WA_UploadResult1_1"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult3"]["WA_UploadResult1_2"]["serverFileName"]
The first two are correct, which is why they work. The others are not. It should be:
$WA_DFP_UploadStatus["WA_UploadResult1"]["WA_UploadResult1_1"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult1"]["WA_UploadResult1_2"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult2"]["WA_UploadResult2_1"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult2"]["WA_UploadResult1_2"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult3"]["WA_UploadResult3_1"]["serverFileName"]
$WA_DFP_UploadStatus["WA_UploadResult3"]["WA_UploadResult3_2"]["serverFileName"]
I'll get the bindings fixed.