In regards to your 1BU blown coverage at home... unless you know they are going to blow it in advance (dont ask me how you would know this) you can only do what you did... Cover his @ss... If someone see's you turning and point him to home, all hell is gonna break loose (now everyone knows that the blue team doesn't know what they are doing) Now that being said... your 3BU should have seen this and should meet up with him in center field 'tween innings and give him the good word. and of course,there is the post-game meeting to rehash this.
Disclaimer: These are just my opinions are not to be confused with actual umpire mechanics, at any time.