I've found in the staff log that someone has accidentally deleted a couple of orders, is there a log where you can find them and view them?
There is no way to view the deleted orders themselves unfortunately. There is a log showing who deleted them if that helps: Go to Reports > Order Change Log, and filter Type to "del" - you'll see deletions of orders, payments, quotes and RMAs.
If it's a serious issue you could try contacting Neto support to see if they can restore them from a backup, but there is likely to be a cost.