Maybe this will help you .....  http://www.crochetnmore.com/123basics.htm#Stitch%20Conversion%20Chart

Uk crochet stitches and American crochet stitches are not the same, the chart above explains the difference between the two and tells you how to do each stitch.

ie ...DC is a double crochet stitch in UK terms but it's a Single crochet stitch in American terms

       TR is a treble crochet stitch in UK terms but it's a Double crochet stitch in American terms etc ....

You must follow either UK or American stitches throughout the pattern and don't mix them.