MLG RULES CONFUSION

I am trying to make sure I grasp the rules but these 2 seems odd:

Players may not Audible Flip plays or send players in Motion in order to get an offensive player uncovered.

Only position for position substitutions will be allowed with a few exceptions.
Any WR or TE may be substituted for any WR.
Any TE, FB, or Offensive Tackle may be substituted for any TE.
Any Offensive Lineman (TE not included) may be substituted for any Offensive Lineman (TE not included).
Any Defensive Lineman may be substituted for any Defensive Lineman.
Any Linebacker may be substituted for any Linebacker.
Any Defensive Back may be substituted for any Defensive Back.
Despite these substitution limitations, Players will be allowed to use all packages available to them in the Package feature. There are no limitations on Special Teams substitutions.

I am pretty sure almost ever game I have seen this occurs - heck it happens in the NFL. Am I missing something or is this specific to an issue?

So this sounds like you can not have LB at the DE spots unless you audible into the formation causing them to move that position or if there is a DE/LB package.

Can anyone please clarify these 2 rules? Thank you!

Just dont glitch, or run no assigment. For subs, basically no offense on defense. We aren't gonna micromanage the rules, but basically don't be clowns.

Guess I am safe...I have no idea what this means "Just dont glitch, or run no assigment." lol my green is showing.