You did notice that the male was chasing the female, and hard, this is the reason we use more than the one female to the tank.
The male then shares his amorous intentions amongst them all, and doesn't have to go after an unwilling partner.
You say you saw it clear 2' up and out of the tank?
What didn't the tank have lid protection, time and time again, I mention killie in one breathe, the next breathe is MAKE sure of a killie-proof lid, they'll fit thru gaps, watch out especially where you have HOB filters or pipes coming back into the tank.
These gaps can be blocked with filter wool or similar.
I know sometimes accidents will happen, like jumping at feed time while the lid is up or off, but be aware of the fact that it is a natural thing for them to do, and just have a quick look at the numbers once the lid is in place again.