Activity Log and Salesforce Mis-Match

[John1]

Hey!

Was wondering if I can get some help since this is my first time encountering this problem:

I am going through a lead's activity log and I am noticing that one of the field updates has the campaign name next to the activity, but the problem is that the actual campaign doesn't update that field and when I click on the activity ID, the source of the activity says Salesforce. However when I click on the record history in Salesforce, it says that the field was updated by Marketo, any idea on what could be the cause of this?

[SanfordWhiteman]

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I am going through a lead's activity log and I am noticing that one of the field updates has the campaign name next to the activity, but the problem is that the actual campaign doesn't update that field

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What does that campaign do (full screenshots please)?