Salilah, in my recent efforts with this style, I have also found that in the early stages a tall mold filled with curds may allow some to slip out of the bottom just sitting around. So I have taken to putting a small weight of some kind on top of the mold (I've even used some clean old hardcover books for this, worked OK). This is not pressing on the curds themselves, just weighting down the mold so nothing slips out.
Then I'm super-careful when flipping, keeping a stiff backer like a cutting board on each side usually. But they are tricky slithery little critters, especially until they knit up and drain a little in the molds. Hang in there, eager to hear how your cheeses progress!