Kiran International School, Boduppal, for two sisters joining together next June

My parents live in Boduppal and help with the girls two days a week. We're considering renting near them next year, so that the help becomes easier on every day and my commute is the only long one. The girls would join in class 4 and class 6. Before I start visiting: does the school usually manage seats for siblings in two different classes in the same year, and how heavy is the homework in those middle classes? I'm wary of brochure answers, so I'd value what current parents have seen over the school's reputation.