horseguy, I was not sure what the point of your post was. Now on re-reading I get the impression that you wanted to go SIN-GCD and your travel arranger booked this via xHKG with a 2 hour connection. You tip is that you can get for a longer transit if desired.
Yes, it's quite a simple thing to ask your travel arranger to book a later flight (in your case HKG-CDG) to make things far less of a worry. Indeed, I have booked overnight transits in HGK - it's still a xONEx transfer as long as the total scheduled time betwixt your flights is less than 24 Hours. (Any more and it becomes a stopover.)
Originally Posted by OT stuff
if you can get SIN-CDG as a "direct" flight (on the one flight number), whether it stops or not, it counts as one segment.
However, as there is no oneworld flight scheduled betwixt SIN and CDG you need to connect. via HKG is one option and as there are two flights involved it uses two segment. This is irrespective of whether it's a stopover (>24 Hours) or not.