Belendor, why fix it if it's better for you? :)
But seriously, this isn't a technical issue: being able to see the exact number of creatures and the enemy hero's primary skills is made possible by having a thief in your army. There's also the useful spell "Foresight". In the normal case, if you have very few or no castles, the number of creatures isn't shown at all (for example, in a garrison that doesn't belong to you); otherwise, an approximate number is shown.
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