What does it mean when you have had 8 positive ovulation tests?

Stop testing. It is normal for ovulation kits to stay normal for several days then become negative. There is no need to check beyond the initial positive result. The hormonal rise that causes the positive result lingers for a few days which will keep an ovulation test positive. Once it is positive then you should begin having intercourse daily.
False pos. Women showing a positive surge 8 days in a row likely have a high lh hormone due to other reason. U should be evaluated for pcos or at least try temp charting. You likely are not ovulating.