Like I say - i'd have agreed if the other eggs on in their inc' carpets and the first clutch of royals on the same shelf hadn't hatched as normal/expected. Also the thermometers are recording ones - they show very little fluctuation
I'll keep a male and breed him back and see what happens then..
Re the hidden gene thing - she looks like shes got 'something' but its not too evident on photos - a bit like adult fires don't photograph too well. Thats why I bred her with a pastel rather than a normal - to see what came out lol.
Cheers