Is it just me or??? <army didn't move>

[Dragar]

I just had something happen to me that has happened a few times before - army didn't move. Now, I haven't gone back and checked that the order was there, but I'm 99.5% sure it was. It seems to happen every now and again, normally (as this time) at exactly the wrong time.

There were 3 separate commanders, and I was moving them one step to hit an army. I was also sending a smaller army with one commander there from a different direction. He arrived fine of course and got killed, whereas the entire army would have had an easy win.

Note that no-one attacked my stationary army, that's not why it didn't move.

Is it just me, or am I really forgetful, or does this happen to people every now and again?