Ok questions first, story second.

Will a breedable male lock up with a 450g female, and will she allow him? Also will a female lock up with a female for any reason at all?

Ok so I have this 1000g bp that I got from the pet store over a year ago. Its what got me started in this hobby. I had a friend pop and probe her when she was about 500g and he said she is definatly a female. Well the other day I had to house her and a 450g female pastel in the same tub and thought it wouldn't be a problem, except when I checked on them, they were locked. I thought it was a accident and they were just cuddling and happened to lock up, so I pulled them apart and an hour later they were locked again. So I pulled the 1000g so called female out and stuck it in with my 2000g female to see what would happen and they locked up as well, so now I guess my 1000g female is really a male? Or could she just be horny and locking up with everyone? Lol I also stuck my 550g male pastel in with that 450g female pastel since he didn't want to lock up at all this year thinking she would be safe, and I found them in a lock tonight??? So back to my 2 questions.