Did your learn the codes yourself? Or are they off the factory list?

If they are learned, then re-learn the codes in a dark room, as they may be corrupt.

Are you using an IR repeater system? If for example you are using a Xantech setup with a dinky link, does the dinky link or blink emitters flicker dimly all by themselves without using any remotes?

Are your commands being issued as macros? If so, change the order so that the commands that skip are last in line. Further, the same should be true of your power commands.