Impression Numbers Not Matching for Automated Personalization Activity

Good Morning,

Hoping someone could shed some light as to why we are seeing different impression numbers for an Automated Personalization activity we are currently running.

Screenshot below shows the impressions of 1.4m for the "Targeted" group

Clicking into the "Targeted" group, there’s 2.8m of combined impressions between the two groups below.

So, the question here is why do I see 1.4 million total impressions in the first screenshot but once I click into the "Targeted Group", I see 2.8 million total impressions.  Hoping someone could help me makes sense of this.

Cheers,

Alex