Especially for Dwilight, and now the invasion on BT, it can be very dangerous to attack higher groups in certain areas. I usually use an intentional strategy of repeatedly searching for Group #1 until I feel the numbers have been beaten down a bit.
Unfortunately, I often get randomly "boosted" into a higher group and end up wounded for several days.
If the wording is simply off and this is intended to be a random thing, not helpful, then fine, but it sounds like this was put in to benefit the advy. If so, a checkbox with the option to not search higher groups would be welcome.