Prospective electoral vote allocation for the next decade

[jimrtex]

The seats aren't apportioned by remainders. The geometric mean (Huntington-Hill) is used instead, and that tends to help smaller states on the bubble.

I've never heard of it before. I did the calculations "by instinct".

Don't feel too bad, that is how Congress did it as well.  The Alabama (and  related paradoxes was discovered by trial and error).

Another possible difference is how you estimated the 2020 population.

[jimrtex]

Why isn't Georgia getting another electoral vote when North Carolina and Virginia are likely to? 

Georgia has one more representative than North Carolina, with only a small difference in population.  They got a favorable rounding in 2010.  The two states are growing at about the same rate.   There is a potential for North Carolina to go ahead of Georgia.  Georgia has all of its eggs in one basket.  At some point that might make it a less desirable place to live.

Virginia hasn't added a representative for a few decades.