City of wonder help (research)

[Vborg]

Hi

When I am finished with a research and are going to choose another, there is three choices. But There is two flight research??? Ever since I could research flight, it's been two of the same research. Is that wrong? What can I do to fix it?

I've try to find this tread in the forum, but didn't find it. Hope I written this tread in the right place.