I find the simplest workflow for this kind of thing is to use the receipt hub “create new purchase” button. Scan a receipt, send it to the hub, “create new purchase”, enter some basic details (which could be the specific supplier or could be a single “generic expenses” supplier), and mark it as paid there and then from the DL account. This will record each receipt as a separate purchase in just a few clicks.
Come the end of the month when you want to know how much to pay yourself back, you can do that by going to the DL bank account and doing an “advanced search” for the appropriate date range and the reference “payment to” (when you mark a purchase as paid from the receipt hub the bank transaction it generates always says “Payment to [name of supplier]”).
It is possible to create one purchase record with several lines and attach several receipts to one purchase, but that isn’t really compatible with the receipt hub method of bringing in the receipt scans via dropbox/email, as the matching there is driven by the total value of the purchase record.