I would suggest that this is because at level 10 (T'orroc's level),
Bards get 0 level 4 spells/day, despite having access to the spell list.
T'orroc's natural CHA is 17, so on login he would lose his level 4 spellslot, and not regain it until he slept with his items on.
Likewise, Rhydell, as a 4th-level bard, gets 0 level 2 spells/day. In order to have a bonus spell in that slot, he would have to have a CHA (after modifier) of at least 14.