Must be a new season

[Rufus]

Coach here with two situations during a game this weekend:

1. 2nd baseman for the opposing team was using a 1st baseman's glove. I've reviewed OBR a bit and didn't see anything specific to the situation other than articulating the dimensions of the glove fielders must use (and I didn't have those dimensions, or a tape measure, handy during the game). Can't find my Fed rulebook and a quick search of USSSA revealed nothing clear. Is there any rule set in which this is legal?
2. HP umpire was giving my catchers advice on how to do their job. We're dealing with 12U rec here but my first reaction was to have them thank them for the advise but that they were getting coaching and needed to concentrate. That's asking a bit much for 12U perhaps so I'm thinking instructing them to give a standard answer of "Thanks" or "Yes sir" would work much better (then do it the way they've been instructed). Any advice on how to instruct kids to deal with (what I'm hoping is) a well-intentioned umpire?

Thanks in advance.