Important Info when uploading Supporting documents! Please can this be stickied if not already.
Top Tip: You can upload up to 20 files per session on eFiling today, without submitting the documents to SARS, and upload again tomorrow and then only submit
www.sars.gov.za
Of particular interest is the following point
"You can upload up to 20 files per session on eFiling today, without submitting the documents to SARS, and upload again tomorrow and then only submit when all your documents are uploaded. In other words, you can upload documents separately but don’t submit until you have uploaded all documents.
However, once you click the submit button, you cannot submit additional documents, as the supporting document link will no longer be available after declaring that you have submitted all your supporting documents. A new link can only be open by the reissuing of another request for supporting documents, by the auditors or verifiers if they require more documents.
EDIT: Its possible that uploading from App and PC is causing some conflicts as submission is supposed to be done as one batch. Maybe only the second upload is counted/overwrites the first, and that could then be an insufficient submission of supporting documents