You're not doing anything wrong Yolanda!! It's only been 2 weeks since you got the diagnosis! You'll hear it a lot around here....this is a marathon, not a sprint. Whiskers didn't become diabetic overnight and he's not going to be regulated overnight either.
You just learned that you really need to be giving his insulin every 12 hours, not once a day, and that means even if he IS below 200, so it's just too soon to know how he's going to respond to this dose. Keep shooting every 12 hours, and test as often as you can.
Post here daily and we'll be happy to help you learn all the steps of the sugardance as well as let you know when to increase if necessary. Read other people's condo's too! You'll learn a lot from others experiences and questions!