Relative order of values and weights in Knapsack
The weights and values can be arbitrary. In particular, if you sort the items by their weight, then they need not be sorted by their value.

More generally, if you look at a formal definition of the Knapsack problem, you will see that nothing is mentioned about the possible weights and values of the items (beyond their being positive integers). Every instance which conforms to the definition is valid.

In other words, you should be able to answer such questions by looking at the formal definition of the problem. There is no hidden information which can only be obtained by asking questions on forums. Indeed, it is exactly the opposite &mdash; the problem statement defines the problem completely.