In lesson 5/13 the adjective "different" is sometimes placed before the noun it describes, and other times after it. One example is: "Il y avait des amis de nationalites differentes." but the next example includes the phrase: "J'ai demandé différentes destinations,"Why does "differentes" come first in one example but not in the other? I think the Tutorial hints at an explanation by stating that one sense means "various", but it doesn't really explain the other usage. Also, I could substitute "various" in either of these two examples, so I'm still a little confused & could use some additional clarification on this.