Possible to ovulate twice?????

I took a clear blue digital ovulation test a week ago when glow said I would ovulate and it showed up as positive. Just for fun I thought I'd keep taking them. For like 5 days after it showed negative for ovulation. Then Friday and yesterday it had the blinking smiley face and now today it has the solid smiley face which means I'm ovulating again??? I didn't even know that was possible....I'm so confused.