Sugaring

Hey, I know that this isn’t very risqué but i dont know where else to ask. I recently got my first sugar wax done (underarms, legs, entire bikini) and I noticed that she didn’t get all the hair even though I clearly saw her go over all locations thoroughly. She said it’s best if I go for two apts per wax. I was wondering if anyone else would suggest that or if I’m lowkey being ripped off. Any suggestions?