Yes, there are errors in the program. These online calculators are based on averages and can never be the criterion by which an individual determines his or her calorie needs.
For example, I put in my information and got certain figures for calorie cycling. I put in my information again, but changed the age,
by 25 years, and got the same numbers. It is most unlikely that two people of the same height, weight, and activity level, but a generation apart would use calories in the same way.
There are many threads on this subject in the Maintenance Forum, which I have found most helpful.
It takes experimenting, and "trial and error", to determine what is right for ourselves.
Sending you lots of good thoughts for success!