The Deal profile has two tabs, and they're not showing the same thing.
Overview tab
Shows whichever cards you've placed in Column 2 through the layout editor, in the order you arranged them.
Activities tab
A full activity log, with the same sub-tabs as the Candidate profile: All activities, Conversation, Notes, and Custom Activities. Deal profiles add extra filters on top: associated jobs, contacts, and company.
Deal-specific activity entries
Deal stage changed — "Stage moved to [stage]", expandable to show the from/to.
Deal properties updated — logged whenever name, pipeline, amount, expected close date, or owner changes.
Deal created, Deal closed, Deal won, Deal lost — each expandable with revenue, reason, and stage movement details.
Contact Associated / Dissociated — logged with a link to the contact.
Company Updated — logged with old and new company, expandable.
Job Associated / Disassociated — logged with a link to the job.
Things to know
Switching tabs doesn't affect your Overview layout, they're independent.
The extra Deal filters (jobs, contacts, company) only appear on the Deal profile's Activities tab, not elsewhere.