It's the monthly change over - if you look at your earnings page, you should see that last month's billing period has updated. The front page stays static for a couple of days during the change over. You can put your invoice in from tomorrow then for last months.
The reporting is normally updated once daily around 10 - 11ish - but some times it skips a day or two which is a tad annoying.
I'm responsible for the Mecca affiliate programme here at Rank Interactive.
Just to clarify, Diobach is right in stating that the Mecca Bingo stats should normally be updated every day by midday or so.
However, the portal is run from an external server which can occasionally be a little unreliable, particularly at the end of each accounting month when all the earnings are being updated, which in turn can lead to a delay in the stats being updated.
I appreciate your patience with this - we are working hard to improve the reliability and overall usability of the portal!
If any of you do have any questions or suggestions for improvements which could be made to it, please don't hesitate to contact me at: affiliates@bluesq.com