As far as I am aware the films have been fully transcribed. You could look at the original microfilms to make sure there hasn’t been a transcription error, but the most likely result is that the entries you are looking for are not on the film.
The British Library burial records are to a very large extent burials conducted by a minister in a church. There are a few exceptions where civilians conducted services. Due to the heat in India, and the resultant quick decomposition of bodies, burials took place within a day or so of death, often on the same day. Logistically, this meant that a person had to die geographically near to a church to get into these records. Accordingly there were many deaths which were not recorded in the burial records.
You could check out alternative sources for BMD records for soldiers in the British Army. Refer the FIBIS Fibiwiki page Chaplains Returnshttp://wiki.fibis.org/index.php?title=Chaplains_Returns