So, that's a no, none of the coaches have said that Grupe was told to kick it into the endzone. Fans constantly incorrectly assume that every player executes exactly how the coach wants them too on every play.
Grupe has been good, but he hasn't been perfect. He's kicked at least one mid game kickoff into the endzone this season. He doesn't miss short FG's or extra points on purpose either, but he occasionally misses those too.
No player is perfect in execution, so the end result of players actions are not necessarily what the coach instructed them to do.
It's common for fans to make assumptions, jump to conclusions, and then convince themselves they know things they don't actually know.