Yes, you can. Simply add to your pledge manually for what you'd like. However, because of the size and weight of the game we are not able to ship multiple sets together. So there will be no discounted shipping to pass on. The shipping cost will be the same for each set.
The Playmat, the Master Sleeve Pack, and the Pestilence Booster Pack are NOT included in the "Everything" pledge. The additional option of having your Hero and Mercenary minis pre-painted is not included in the "Everything" pledge. These things would need to be added manually if you wish to have them.
It is listed incorrectly in the Kickstarter. If you live in Norway, select Sweden as your location to get accurate shipping charges. If live in Switzerland, select France as your location to get accurate shipping charges. Then in the PledgeManager you will be able to enter your correct address in the actual country you live in.
Don't see the answer to your question? Ask the project creator directly.