Hi Ede,
I am new to the area of Dart frogs, but what I saw with the E.tricolor is that they behave normal. Means carrying on there eggs/tadpoles when I don´t find the eggs and the male is not looking for further breeding as long as the former eggs are in the terrarium and he has to care for them.
Actually, as tricolor is pretty commonly bred, some breeder let the frogs care for their eggs and lower the amount of work on the keeper.
Uwe