I have been encountering a few situations where I go on a trip to battle whoever, and find that once the battle is done, I fight again - different enemies (same type but random specs) without the requirement to travel back to town. Then I fight them a third time. Each time I am getting experience and gold (maybe an item drop). This is great and it's an awesome time saver - but can be dangerous because I can run out of health.
How does this happen? Can I do anything to intentionally have these repeated battles?
Also, On one of my previous encounters, I fought alone for the first round, but then wanted to have my mercs fight with me as more fighters appeared. I couldn't click the tick-box to bring them into the fight. The tick-box would not enable. Why is that?