Also, continually change the toys and perches. I'm not sure if the article mentioned this, but parrot species tend to get into the brooding mode once everything is in abundance, everything is stable, and the amount of daylight is increased. By switching perches and toys around, you're creating a less stable enviornment and the bird will be less inclined to lay. Also, objects such as an extra feeding cup can trigger the need to breed. I learned that the hardway Softfoods can also trigger the need to breed. Just some more tips

Also, No. The eggs generally do not stink if you leave them for about a week or two. Think about it this way. In a typical clutch, one or more egg will usually not hatch. However, experienced breeders like to keep the infertile eggs in the nest anways (provides warmth and support). The eggs are kept in the nestbox until the chicks fledge. That's about a month, so keeping eggs outside for a week or more shouldn't make it smell. Hope this helps!