It seems that the data displayed on the main lobby page is out of date more or less constantly. More than half the time, if I try to join a SNG table, I find that the table has already filled, even though the lobby reports that it still has empty slots. Filled tables don’t drop off the list even with “hide running” enabled.
Likewise, a table that had a player registered who left shows that it still has the player registered long after they gave up and left the table. I click the link and find the lobby is empty, but go back to the main lobby page, refresh, and it still hasn’t updated to reflect the correct number of players registered at the table at present.