Once the frogs are laying, they will often continue to do so. Expect more eggs in small clutches, for several days or weeks. This is especially true if you have a breeding colony with multiple females.
If you don't provide the petri dish or a dark and private spot for them, they may find other locations in the enclosure. Look under leaves.
The reason for using the petri dish and removing it is to keep the eggs clean. If the eggs get dirty or contaminated, they will often develop fungus. If you notice that some eggs have developed fungus but others look healthy, it may help to remove the contaminated eggs very carefully.
Keep the healthy eggs moist until the tadpoles hatch, then immediately transfer the tadpoles (very carefully) to water. It is best to keep these tadpoles individually.
Learn everything you can about care before the eggs hatch. You can start here:
http://www.dendroboard.com/forum/care-sheets/14606-dendrobates-azureus-tinctorius-novice.html Improper care or feeding an improper diet will result in poor development and possibly death for the tadpoles.
Good luck and congratulations! :happy: