The on/off path check is done completely right on the server (in AIRIO), only results are sent to airio.eu (to AUTIO). If you do not see the on/off path messages, you may have Path check messages turned off in !opt, or Airio does not have the necessary path files available. Also Airio PROS is required for AIRW data. At present there are no problems, and all data are processed correctly.
Actually, there was one more condition added today, that may have influence in certain cases. Updates of people with LFS Experience Index below 100 are ignored. This is done to protect demo good laps from speed hacks and data loss (as it happened twice already). The requirement has additional implication: People with hidden LFSW stats have 0 experience and are from today ignored by AIRW.
To be recognized, LFSW stats must be made available. I have already contacted people that have many LFSW records stored, but they hide their LFSW data. In several days all such records will be deleted (several dozens), only people with known experience will be considered by AIRW.