i had this problem till recently. make sure you are trying to craft them where you are suppose to.
when you craft, there is a list of stuff to get right? beside that list there is a clock, and right under the clock there is an icon. move your mouse right over it, and it will tell you where it needs to be crafted at.
for example: it will show a yellow test vial for the basic craft table
another example: it will show a picture of grizzleheim for the grizzleheim craft station ect ect.