Yes there must be loads of pairs, need to raise the bar to triplets. Here’s three different routes in the space of four minutes:
08.01 London Bridge to Dartford via Woolwich
08.02 London Bridge to Dartford via Sidcup
08.05 London Bridge to Dartford via Bexleyheath
+London Bridge to Dartford via Greenwich
Dartford has four (five via Parks Bridge Jn which is a " different location", six if you count the Tanners Hill spur at St Johns).
Small point of order. You can't get to Dartford from London Bridge going through *Parks Bridge Junction (apologies in advance for the needless pedantry)
If you only count the station points then you have :
London Bridge to Dartford
London Bridge to Lewisham via Tanners Hill (no calling points)
London Bridge to Lewisham via New Cross and St Johns
London Bridge to Sidcup via Lewisham
London Bridge to Sidcup via Parks Bridge (no calling points)
London Bridge to Kidbrooke via Lewisham
London Bridge to Charlton via Lewisham
London Bridge to Charlton via Greenwich
If you extend the route to Rochester; you could add via Sole Street. If you extend Backwards to Blackfriars you could come up with a few more permutations and if you extended further backwards to St Pancras you could add HS1 as an option
*unless taking a really long diversion
