I'm finding that after selecting a unit to train I'm regularly pressing the 'Train' button that opens the unit training window rather than the 'Train' button within that window - so I think I've queued a unit but in reality I haven't. Could the button in the Unit Training dialogue be changed to 'Recruit'.
Similarly 'Build' has the same double-up but this isn't such a problem because usually you place the buildings where you want them on the map. But to keep it clean perhaps the 'Build' button in the Build menu could be changed to 'Construct'.