Neither of those have changed. The turnarounds at Bromley South were fairly tight and it would only be an extra set/driver at peak times to extend to Orpington, some pathing time added between Bromley South and Orpington to make the platform allocations simpler. Beckenham Junction - Blackfriars services are showing up as well so maybe partially capacity related.Does this mean that Thameslink have given up on Orpington, or have SE decided the capacity to turn around at Bromley South no longer exists?
More curiously is 2G93 1733 London Blackfriars to Dartford via Sidcup. Can't see if it's replacing something else, but is a single service doing that route evening peak only.