Call me crazy for someone to help me understand please when u take a ovulation test it's spoced to…

Call me crazy for someone to help me understand please when u take a ovulation test it's spoced to come.up with just a control line if ur not ovulating

I got a bright positive ovulation test in the 14 of this month and decided for shits and giggles I would keep taking them and all of them have come up with one line till this morning. Can u ovulate twice month?? Is the test incorrect??