Don't panic!, it only means that they're trying to enforce the so called FIFO at the I-485 stage. They couldn't do it at the BECs, not to mention PERM, so with ancient cut-off dates they can control the flow. With these dates nobody will be able to file for I-485 in the next few months, so BECs can work on the 2001 and 2002 SWA cases. Once those are cleared, I'm sure the cut-off dates will jump years.
It is a bad news for perm applicant since I don't think it can will to current for EB2 and EB3 unless new law will be passed.
It may be fair for those had waiting in DOL for a long time.