Well, one thing wrong is that you don't actually need such high dosages your first time. Another thing is that you do run the possibility of messing up your thyroid for life, if you misuse thryroid products. Of course, unlikely but can happen if you misuse/abuse the product.
Since this is your first time, start slow and stay on the slow path. You can always bump up on your 2nd cycle. It is a bit conservative, but it'll be better for you in the long run.