Something to keep in mind when popping males: after they are 2 weeks old, popping is not always 100% accurate, because the babies gain sufficient muscle control and some males may not evert their hemipenes. So in effect you pop a male, see no hemipenes, and assume it is female. Especially if you've not been properly taught how to do so. This sounds to me like the scenario you have run into. You've popped it as female, but the probing tells you male. Probing is much more accurate in older snakes, so if it was me, I'd go by the probing. But do keep in mind, probing can harm your snakes (as has been previously posted here) if you aren't doing it correctly.