Welcome! Nice numbers all around, for both twins.
1. Hard to say. Looking at it from a neutral school perspective, it would make sense to want some confirmatory data (academic, IOW), since the in-house eval was so different from the outside eval. If they don't have experience with this evaluator, it wouldn't be totally crazy to wonder a little about score shopping. Believe me, I've seen people do it before. There's also another consideration, which is that even a very bright child may or may not be successful in an academically advanced program if it doesn't match their skill set. If this is the right program for your child, I don't think there will be anything to fear from additional academic evaluation.
2. I don't have my tables with me, but I can check tomorrow.
