The statement pdf name is set to the date and time the statement was downloaded which seems irrational to me, I want it to be the month of the statement, preferably in ISO date format so it lists correctly by date.
Starling get it right in that the statement name is the month of the statement but wrong in two ways: they force you to enter your password for every month you want to download (tedious as hell) and the name format doesn’t work to list the statements by date.