I know some coaches will be added at vskp on perticular days only. Eariler they used to club with Hwh-tpty express which is cancelled. Now they are attaching to these trains and those coaches will have name board as Visakhapatnam-Shidi only. I think these coaches wait at Vijayawada for around 3-4 hrs to get attached to Kakinada-Shirdi express. Funny thing is even though the kakinada-shirdi extended to SNSI from manmad....I think still they are issuing the reservation to these slips to manmad only. Very complex situation.