TIB669D is not a 178 bus.
SMB2E
WLDEP SP 
WLDEP 178
It seems that the ex-656 duo has already taken this bus back in
Sept 2011, but for unknown reasons it went back hiding in WLDEP for
4 months.
SMB2E is indeed 178's 5th bus permernant until further notice.
No wonder the 5th block has been missing all these while for 4
months straight.
