Please dont speak in chat speak! It really gets on my nerves, unless it was like a AIM convo. Eating algea and messing with bubbles are normal behaviours. Being on one side of the tank either means one side is warmer, or they just prefer one side. The fry might make it. You could probably put 10 fry in a 2 gallon tnak temporarly, but you would need something like atleast a 10 to grow out. Yes mollies and guppies can interbreed. But, it isnt common at all. I have ( had) a golly ( guppy/molly cross), and when i posted pics on here, only half of the forum belived me, the other half said it wasnt a golly. I have only ever heard of one other person on this forum that has succsefully crossbred them, but then they died. So, most likely your molly is pregnant from your store, and the guppy probably wont impregnate her, and if he does, she most likely wont become pregnant.