Fullpath campaign names are not actually campaign names.

Typical Google Ads layout

In this scenario, the UTM tag is placed at the Campaign level (red) with the tag utm_campaign+variable, and applies to all add groups within that campaign.

CampaignA

Ad Group1A

Adgroup2A

CampaignB

Ad Group1B

Adgroup2B

CampaignC

Ad Group1C

Adgroup2C

CampaignD

Ad Group1D

Adgroup2D

Fullpath Google Ads Layout

In this scenario, the UTM tag is placed at the Ad Group level (red) with the tag utm_campaign+variable, and applies only to that Ad Group. It does not necessarily reflect the name of the campaign.

Campaign1A

Ad Group1A

Ad Group2A

Ad Group3A

Ad Group4A

CampaignB

Ad Group1B

Ad Group2B

Ad Group3B

Ad Group4B

Campaign1C

Ad Group1C

Ad Group2C

Ad Group3C

Ad Group4C

CampaignD

Ad Group1D

Adg Group2D 

Ad Group3D

Ad Group4D