Apply Date defaults to the date an invoice was actually entered. For example, if I open Invoice Entry today and post an invoice, the Apply Date will default to December 6th. However, the Invoice Date is the date printed on the document – the date the supplier generated their invoice for AP invoices or the date your company shipped the parts for AR invoices. The Apply Date is affected by the Earliest Apply Date settings and closed financial periods, but I don’t believe the Invoice Date has any restrictions by default.
What I see with your example invoice is that someone entered that invoice on November 2nd, but the invoice document itself was sent by the supplier around September 1st.