BR0THB3RG:
In the picture, it shows a resistor on the middle pin of the green mosfet and the blue mosfet. Instead of putting the resistor there, he mirrored the configuration for the red mosfet in that picture.
Oh, I see now. Yes, either the red or both blue and green FET connections must be wrong. We can't say which without knowing what FET the author of those diagrams was using. Different models of FEt will have Gate/Source/Drain on different pins.
BR0THB3RG:
The problem is that when the IR sensor is plugged directly into the board and we press the brightness down button on the remote, everything stops working. The sensor starts reading in random values and random time intervals and no longer reads in the commands from the remote. It doesn't start working again until we reset the arduino.
No idea without more info, part numbers, schematics and sketch (which you already posted).
BR0THB3RG:
As for logic level MOSFETs, are RFP30N06LE from sparkfun what you were referring to?
Yes, that's more like it. There are lots of logic-level FET models available.