As young fish it could take them several tries. This happens a lot with inexperienced cichlid pairs -- discus, angels, and severums to name a few. A lot of people claim that most angels won't parent-raise, but I find that to be untrue. It may take a dozen spawns, but eventually most will get it right one day.
When those multispinosa started pairing off and spawning here at my house, I think there was just too much activity in the tank for the pairs to successfully defend a spawning site. You've probably seen by now how active and pushy they are with each other. A calm, relaxing environment where they can focus on spawning may be best. I'm of the mindset that you could just let them keep trying until they get it right -- they're young and they have plenty of time.
When those multispinosa started pairing off and spawning here at my house, I think there was just too much activity in the tank for the pairs to successfully defend a spawning site. You've probably seen by now how active and pushy they are with each other. A calm, relaxing environment where they can focus on spawning may be best. I'm of the mindset that you could just let them keep trying until they get it right -- they're young and they have plenty of time.