Why does the Pasuk suddenly refer to Eliezer once again as "ha'Eved"?
Seforno, Malbim: Having passed from the hands of her father's Sheluchim 1 into the hands of the Sheluchim of her husband, Rivkah was married, in which case, she was now Eliezer's mistress, and he, her slave.
Besu'el was dead! It seems that this refers to Lavan and her mother, who were in place of Besu'el to marry her off. (PF)
Having told us that Rivkah and her girls were riding on camels in back of Eliezer, why does the Pasuk then say that Eliezer took Rivkah and they left?
Ramban: Initially, Rivkah took the initiative and gathered the women, placed them on camels and followed Eliezer. Eliezer then placed her beside him in order to guard her.
Ha'Emek Davar: Initially, men and women were accompanying Eliezer and Rivkah, respectively. Rivkah was ashamed to sit on the camel with Eliezer in front of them. When they left the city, the accompaniment returned, and Eliezer took Rivkah on his camel.
What is he significance of the fact that Rivkah and her girls rode specifically behind Eliezer?