Sellers are usually located in different places, so even if you pay for a number of products at the same time, they're still going to be shipped separately.
However, there are a few exceptions:
• If you purchased various goods from the same seller, they may be included in a single package
• If you ordered a number of products from various sellers within a short period of time, the parcels may be consolidated at our warehouse, i.e. placed in one big package and sent together
The more products you buy at the same time, the greater the chance that they're consolidated (but it's actually hard to predict this before they are shipped). If they are, these orders will be displayed in your purchasing history under the same tracking number.