I think what you should do is to wait, i did the same on December 2nd and on 12th i received the email about docs being received, I became current in Feb but their is no 2NL yet. However basing on Britsiom and the information on the platform, it shows that they had send 2NL up to 18000. Yet am at AF20XXX so we waiting patiently and hoping it will come before month end i advise you do the same.
One even sent his documents in August and got the email for READY FOR SCHEDULING in October
I don't know the reason why this has happened
From this experience, it has nothing to do with when the email was sent
I guess there's something we still haven't understood yet on this year's scheduling process