Spells and death

This has always confused me when i read the books.

In book 6 harry had known that dumbledore was dead as soon as the body bind jinx was lifted. That made me think that when a wizard dies, the spells they did get lifted.

But in deathly hallows we see that its not the case. Moodys jinxes against snape in grimauld place were still working when the trio went to the house.