field ump in the way of MIF pick 1st and 3rd play

Actually, it's on the other side.  Your frustration is warranted.

It depends on the mechanics set being used.

To the OP:  Why not run the play with F4 taking the throw? (Or have F6 move closer to the base?) (serious questions) 

That being said, umpires do not switch positioning based on the defense. By that I mean that we will not switch from B to C or vice versa. We will adjust to the situation at hand (step up or back, left or right.)

I add that just so if down the road, the OP has an umpire that knows where he's supposed to be, he doesn't expect him to switch based on plays he's running.

my F4 has a weak arm (like i said, really small rural area, barely able to field a team, no tryouts/cuts or anything, just whoever is willing to play and has the grades.) if i was in a situation where i had the ability, i would have SS or 2b (depending on LH or RH batter) come in directly in front of the bag and either cut down a 1 hop from the catcher to 2B if he can get R3, or let the throw go through if we think we can get the kid stealing 2B. but, i simply do not have the cards in my hand, know what im saying? so this is my improvised version of the play for our level of play/competition. and ive seen it work well before. SS is the only one with the arm and the savy for the play on my team, and the objective is to catch an aggressive runner from 3b in a pickle an he has better positioning for that than F4 would. I do not expect blue to know what we are running for plays, thats not his job. However, when he clearly botched the play for us just an inning or 2 ago, i would appreciate it if it didnt have the exact same outcome the second time around. During the course of the same game, i think that little bit of consideration would be nice/not too much to ask for. jokes on me for trying it twice i guess...

I wouldn't venture to help out with that play, but my MIF has been told that the umpire is part of the field and if he doesn't get out of the way of your play, tough luck.

There is nothing you can do if that umpire is working an older version of the then accepted mechanics. He is where he was taught to be. There are newer mechanics that most of us use that would put him in a differing location, but only for better umpire advantage and not a possible play advantage....

The umpire in that case is just part of the field and is not interfering or botching your play....Your MIF needs to adapt......they can also say...." hey Blue gimme a step left".....

There are only 2 types of umpire interference....being hit with a batted ball and interfering with the throw of a catcher.... the rest is play on....  

Good point PIAA

My usual SS is a junior/captain, really good demeanor and all. I'd feel comfortable having him politely ask blue for a step or 2...typically i get nervous whenever a kid talks to an ump haha!

Just out of curiosity, what is the outcome of an ump interference call in either of those situations you mentioned? any batted ball that hits an ump i imagine would usually be a single or a really tough play ground ball, so im assuming the runner would get first? and idk about a catcher throw, thats a tough one.... runner goes back? would my catcher throw to the SS on this play not count as a catcher throw? its gotta be a throw directly to the bag for an out? Thanks in advance!    NFHS rules of course, if i didnt specify already. 

Umpire struck by a batted ball- NFHS 5.1.art1f- Immediate dead ball, Runners return to bases occupied at the time of the pitch, unless forced by the batter runner. Batter is awarded first and credited with a single.

Umpire interferes with Catchers throw- NFHS 5.1.art 2c-Delayed dead ball, if runner is not put out by the catchers throw, then all runners return to bases occupied at the time of the pitch.

As a trainer of NFHS umpires, it is important to me that Umpires are cordial and approachable to players with any question at an appropriate time about the playing action of the game.

No. The rule applies to the plate umpire making contact with the catchers throw on a runner stealing.

Ahh, that makes sense, i thought you were talking field ump.