Hi @anonanon88876
You're assumptions are valid, and it is necessary to get capacitors that have the same or greater voltage rating but with the same capacitance, but I don't think that they're telling a "lie" about the values.
To me it's an explanation of how they're connected.
You should be able to use either the combination of grey - brown and red to the 10µF lead and the grey - green to the 5µF lead or even the grey - green and brown to the 10µF lead and the grey - red to the 5µF lead. It makes no difference, as long as there are two 5µF capacitors connected in parallel.