That particular plant needs to dry out between watering's. Are you allowing it to dry enough? Test it by sticking your finger in the soil up to the first knuckle crease in your finger. If it is dry then water it but if there is still some moisture then wait.
#9 Yes! I took the plant outside in the 80 degree weather with a fresh watering and it perked right up by the next day. I think it just needed some heat, I do tend to keep my house on the chiller side.