1st time at IKEA - the stores are arranged as a maze to force the shopper to see every item in the store. The carts are available only at the entrance, and at the exit - tough luck if you need more space.
The staff often times will move your cart if in the isle. I even had my cart UNLOADED by the staff while I was searching for the storage containers for a shelf system halfway back through the maze they call a showroom. Also, watch out for items being on the the wrong shelves - especially in the self-serve furniture department.
Frankly, I will never go back to ikea again.
If you have the entire day to waste while being herded like mindless cows through their showroom maze, fine. But if you have chores to do, and need to find an item quickly and get on with your day, forget it!
Their concept is to herd you through a maze of theme rooms whilst enticing you to impulse shop, then further drug you with cafe food, and confound you with misleading signage, all in the hopes you'll spend more of your hard-earned dollars there. This has got to be the perfect example of the European socialist consumer ideal - numb them until they give us all of their money!