The best way to control units is to learn the keyboard shortcuts for unit commands, and use the keyboard commands in combination with the mouse, just like in the desktop version of Freeciv. So for example, first use the mouse to select a unit, then use the keyboard shortcut for goto (G), and then click on the tile you want the unit to move to.
Okay, actually the reason I was confused is the web interface seems to be very buggy. W, for instance, seems to shuffle you back and forth between two units as often as it cycles through all of them. And lots of activities, like R or I, just leave you sitting on the unit you assigned it to, rather than sending you to the next unit waiting for orders.
Yes, there is some room for improvements in the unit controls. If you could please list all the bugs you find in unit controls, then I would be happy to fix it in the next version.
