Ever since the 1.6.2 update, if something activates a wooden Pressure Plate it will stay activated.
It only happens on one world, and even then only in 2 chunks (my HUGE survival world).
Is there a way to fix this?
Minecraft – My wooden pressure plates aren’t deactivating
minecraft-java-editionminecraft-redstone
Related Solutions
Updating answer with much more compact version
Old stuff
I hate answering my own question but I found the answer here: http://www.minecraftforum.net/viewtopic.php?f=35&t=60816 (I was searching google for a switch diagram when I found it via station selection search since it seems most people use it for minecart stations)
Here is the schematic for anyone interested in reproducing it. This particular one is great because it's only one button wide which makes it perfect for my goal. 
Here's another one that has the indicator lights on the same plane as the button but I haven't checked this one to see how it performs. 
The pressure plate actually powers the block below it, so you can get the signal from below the block where the pressure plate is:
There is no need to have any holes on the floor.
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Best Answer
Resorath is right in saying that the connected circuit may be activated, not the pressure plate. To tell the difference, press F3 and look at the pressure plate when it should not be activated but appears to be, and check if "activated" is set to "true."