same issue here :(
Edit: I think I found the solution: force-close dominations app and reload, that's it! on ios it can be done by double clicking home button (i don't know how it works on the models without a home button) and then swiping the app out. on adroid you can do it from program...
Museum benefits are not added up to the statistics of the troop info. just like coalition benefits you can just "feel" them during the attacks... It would be really handy tough, if we could see them at the "Prepare for Battle" screen.