I know - I found it very bizarre as well, but they definitely hadn't this past winter. I found out while checking out the availability on a GDS, and then confirmed with my travel agent as well as CX in BOM.

The daily increase is only for Dec / Jan however, and then it goes back to four times a week. This is because of the limited landing rights arrangement between India and Hong Kong.

Pity, since CX is really, really losing out to SQ from BOM, with SQ's twice daily service AND its much more convenient timings...