Hopefully the big teeth will push the baby teeth out.
As long as it doesn't seem to be bothering him, keep an eye on it and let the vet know next time you go. Of coarse the baby teeth might have fallen out by then and there will be nothing to show him.
chiwi had to have 7 baby teeth that weren't coming out removed since the adult teeth were grown in as well. she has 2 more (the eye teeth) that are loose now, hopefully they fall out on their own, i do not want to put her under again.... i had the 7 removed when she was spayed, it's common practice... especially with toy breeds.