Text on Signs Not Working with Block Data Command

When I edit a sign with /blockdata the sign does not update correctly(See pictures) I have tried this same thing in 1.8.8 and it works fine but dies not work in 15w42a.

Commands in command blocks:

/blockdata ~ ~1 ~ {Text1:"{text:\"Difficulty:\",underlined:true}",Text2:"{text:\"Normal\",color:\"green\",bold:true,clickEvent:{action:\"run_command\",value:\"/setblock ~ ~ ~2 redstone_block\"}}"}

/blockdata ~ ~1 ~-2 {Text1:"{text:\"Difficulty:\",underlined:true}",Text2:"{text:\"EXTREME\",color:\"red\",bold:true,clickEvent:{action:\"run_command\",value:\"/setblock ~ ~-1 ~-1 redstone_block\"}}"}