All my dogs have been adult rescues, so never had to toilet train a pup. DD and partner are now the doting owners of a mini dachshund, a lovely boy aged 15 weeks. He is still weeing and pooing about the house, despite having designated area, pads, newspaper etc inside and regularly being taken into the garden. They praise / reward when he does go to the door to go outside. He's so full of energy it seems that sometimes he is racing about and forgets, then wees (over-excited?). He goes outside just before they go to bed, about 10.30 - 11.00pm then wakes them whimpering about 2.00am and again at 6.00am, when he goes out to wee a small amount.
Is this the usual sort of time frame for toilet training? What else can they do to help him along?