Wrong Number of Ants labelled for the Nest Group

[BelgarathSorcerer]

I just noticed while playing a round of 2-1 that the nest group shows a number of ants that is double what I currently had in the nest group. I am curious as to whether this reflects workers in other groups that are working in the nest group or whether it is just the wrong number and is there to confuse me. In the picture below you can see I have 53 workers in the group even though the number above the group says there are 120.

 

[Rayalot72]

Not sure what it means either. It may simply be ants in the nest at any given time.

 

[BelgarathSorcerer]

Not sure what it means either. It may simply be ants in the nest at any given time.

It doesn't change though when I remove the ants from inside the nest, and I've never seen to get near the 400 ants I ended up getting that playthrough