I am attempting to set up a timeline for a set of case types. I made a sequence for a few activities. However, the scheduled date automatically sets to the current day. How do I get it so that when an activity is added due to a sequence, its date is set based off an offset value?
Sequences are different than timelines and don't have offsets. See https://docs.civicrm.org/user/en/latest/case-management/set-up/#define-case-types and go down to step 5.
A Sequence defines the order in which a set of defined activities should occur, but unlike the timeline it includes no information about time intervals between activities.
For timelines use the reference and offset fields.
In a Timeline you control the scheduling of each activity in your timeline relative to the date the case is opened, or relative to another activity in the case, using the 'Reference' and 'Offset' fields.