The rake that runs as 67298 from BZA to OGL, continues as OGL-GDR MEMU after a 30 minute halt at OGL.
There are some distance restrictions on running passenger trains like EMUs, which do not have toilet facilities. The number usually quoted was 160km ( There are some exceptions, but I am not aware how those work). So many times, a single service is broken into two nominally different services. In this case, the same train will continue to Gudur. For official purposes, it's two separate trains, but unofficially, a passenger can basically just take a ticket to Gudur and continue on the same train to Gudur. So, the board might be displaying this....
more... Most of the regular passengers on the route are usually aware of such things with passengers/MEMUs.