Tinted Moisturizer

So, like I said the other day, I had bought some things at Sephora and tried them out. One of the things I tried was Laura Mercier's Tinted Moisturizer - Illuminating. The first time I used it, I assumed I didn't use enough. It was hard to spread everywhere and didn't seem to blend well. So this morning I figured I'd try again. I really wanted to use this moisturizer under my makeup for the wedding because it's supposed to give you a nice glow, but clearly I didn't know how to use it. This morning - disaster! This time I definitely used enough to be able to spread it on my face, but it dried almost instantly into this cakey mess! I looked so scary! I had to immediately wash it off! What am I doing wrong??