I'm trying to help my parents book the following in business class as multi-city trip:
- AMS - SIN - BNE departing on October 5th (SQ323 + SQ265) with 1h25m layover
- CHC - SIN - AMS departing on December 13th (SQ 298 + SQ324) with 30h15m layover (so staying a day in SIN.. arriving 13th at 17:40 and leaving 14th at 23:55)

We found this ticket for one adult in business lite for ~6550 EUR and this sounded reasonable, but when we tried to book it was suddenly ~7600 EUR per person and it didn't show business lite anymore (just standard, and flex). Presumably this is because there is no business lite availability for 2 people? But interestingly booking business standard for 1 adult is not 7600 EUR per person, but ~7000 EUR per person so not sure why that's happening.

Would it work to book one person in business lite and one in business standard and pay 6550 EUR + 7000 EUR (instead of 2*7600 EUR)? The website doesn't show it, so would have to buy it separately, or is there a workaround (call?)? And would this be on one PNR?

Is there a possibility more business lite gets released at some point? The flights are 9-11 months out so there is a fair bit of time left.