I feel your pain brother!
I learned this myself the hard way. I bought 2 het for albino females from a guy I trusted . I raised these two for 3 years and 1600 grams. this season I was stoked to finally breed them !
After repeated attempts The one female would never lock with my male. One day while cleaning I put what I believed to be a female into another males tub temporarily and they started to combat!
I couldnt believe it! I Probed it as male and popped out plugs, What a disappointment. 3 years of patients and hard work down the drain . This will never happen again!!!!!!!!!