Playing CORE as Germany, 4 divisions are upgrading as the games begins - two level 1 interceptors and two headquarters. I noticed these upgrades seemed to be taking really a long time. So I did the following to check it out: I prioritized one of the interceptors and set the upgrade IC around 18.5. In this way only one interceptor was upgrading - the other three divisions remained static (I kept an eye on this in the statistics window for land and air units). At around 18.5 IC it took 161 days to upgrade to a level 2 interceptor. A new level 2 interceptor is 13 IC for a 185 days (and these numbers drop once the industrial techs start to get researched). It's cheaper to build new than to upgrade. This can't be right. Or I am doing something wrong. Ideas...?