Your order will come through, I've had about 20 & none go missing, touch wood
Read the reviews & discussions on the items too, always worth it see what sort of quality you'll be getting or if the item's not worth bothering, you'll also learn any quirks
Both mentioned but yeah, split your orders up into multiple deliverys, I tend to have 3-4 items per order, depending on size & use China Post. I normally get orders in 6 days using that option. Sing post on the other hand is slow as heck