I have never met a creationist who understood evolution. All of their polemics against the theory, even what you find in books by authors who should have first read some themselves, boil down to straw-man arguments. I sometimes suspect that these books are really just covert misinformation campaigns - something they succeed at very well - instead of genuine attempts to refute the theory of evolution.
The smart creationist concerns himself solely with with origin of life itself rather than the origin of species, as this is one of the few dark corners that science hasn't yet shed its light on.