On his return through Benevento, he signed a diploma in favor of the monastery of Santa Sofia on 11 March.
Santa Sofia was the familial foundation of Pandulf's line and probably acted as their mausoleum.
For reasons unknown, Otto and Pandulf had a falling-out in 1000, possibly over the relics of Saint Bartholomew, patron saint of Benevento, to whom Otto had constructed a new church on the Isola Tiberina—San Bartolomeo all'Isola—just recently.
In 1003, a rebellion led by Adelfer, Count of Avellino, ousted Pandulf and his son from Benevento.
The revolt would prove to be a bad sign however, as civil unrest began to rise in the county.