I really don't know how experienced you are at growing... But those male flowers can be hidden.. Appearing when you least expect them to.

When a female turns male.. It's called a hermie. Both types of flowers.You have stressed it somehow.. Heat,light leak even underwatering will cause one to stress to the point of hermming.

I won't argue! 100% female? That in my book is a female.. 100% female with male flowers is a hermie. STRESS related.

Ga.