Trust your instincts. If something feels odd, too hard *for this kid* regardless of measured grade level, there may well be something there. (The challenge, of course, is convincing the school you're not crazy.).
The thing with kids who are 2E is that they can be simultaneously - and visibly - way ahead on some tasks while underlying processing skills are lagging behind. It's not until the complexity of the task gets high enough to overwhelm the other strengths and compensation mechanisms that you realize the child is missing a key skill. For instance, throughout K my DD was one of the two strongest "readers" and "writers" in her class - but two years later, she was still at the same level while her classmates had automated those skills and moved onto more complex materials.
Long way of saying, trust your gut if something feels too hard, and don't let them convince you to wait until the child is failing - because for a 2E child, that can be a long, long way down and a hard climb back out that hole. Really, really trust yourself. You are the one spending all that one-on-one time with the kid, and lots of research agrees that you really do know better than the experts when a child is off-norm in some way.
