This is not r2la problem. This is specific to how rF2 creates xml logs - drivers which are not present on server at the Practice session (and I think Qualy) end are not included in xml results by rF2. There is no <Driver> data in your log for Exxa and yosua. r2la needs <Driver> data to show driver results. Unfortunately, because of that, r2la is not the best tool if you host long Practice sessions and want to log every driver that enters and leaves before session ends.