A stand alone tub is not the same as a tub in a rack and she still needs at least two hides. I would provide her a second hide then continue to handle. Our pastel doesn't strike all the time, but she does hiss and get huffy a lot and bluffs like she's about to strike. She's in a 28 qt tub with three cereal bowl hides in a rack system and we've been handling. She may always be 'aggressive', because while it's uncommon in ball pythons it does happen. A lot of the time babies do grow out of this stage, though. She may just need time.