The second burial notice is regarding Joseph. Joseph was not Joshua's contemporary, as Eleazar the high priest was. Joseph had died a long time ago in Egypt and was buried there. But when he died, he made the people of Israel swear that they would take his bones and bury him in the Promised Land when God would deliver them from Egypt. So, at the time of Israel's exodus from Egypt, his people brought his bones along with them (Ex. 13:19).
Obviously Joseph's request showed his desire for the Promised Land. He knew that he was richly blessed by God. It was not easy to be sold as a slave, and by his brothers at that. It was not easy living away from his family in a faraway country without knowing anyone and having anyone to depend on. But in his loneliness, he learned to depend on God and wait on him. This was the most valuable lesson he could ever attain, worth much more than all the time he spent in slavery and imprisonment, much more than every drop of tear he shed in loneliness and sorrow, much more than all those times he desperately asked, "Why?" and felt no one heard him, not even God.
We get attached to people and things. We feel like we cannot live without them. Then, they are taken away from us. We are devastated and yet life goes on. We even feel guilty that we can go on living. But we realize that what has been taken away from us is not what has sustained us. It has been God all along. The people that have loved us and cared for us were merely the instruments whom God used to take care of us. The things we have been so attached to were merely the gracious gifts which God blessed us with. It is not the laws of nature, which hold the universe together; it is the power of God. What are the laws of nature anyway? They are the multi-faceted manifestations of the providential power of God, by which He upholds and sustains the universe! It is He whom we should trust and hold on to. His instruments are wonderful and precious gifts. But they will come and go when they have served their purpose as God's gracious instruments. But God is faithful through them all, never leaving us nor forsaking us.