I agree in part with what you're saying, though I don't think that strict creationists are unstable. If you're referring to Dr. Ross, I also don't know if he would class himself as a strict creationist.
Did God use evolution? In some form He did I think. I don't believe that He created the earth in six 24-hour days. I also don't believe that the Earth is 6,000 years old. (I personally think that the earth is several billion years old.) I certainly don't believe that life sprang from the muck *unaided* and evolved to the point of man. However, I came to my opinions on this subject after years of study and after looking at the different points of view at length (or at least as much as someone of my non-scientific vocation is able). On the other hand, I find many who argue that evolution is an established scientific fact have very little understanding of the argument, let alone the facts involved. They base their entire understanding of the origin of life on their 10th grade biology teacher.
It's not a simple subject, but I respect the views of those who consider themselves strict creationists. I may not agree with them on every issue, but I understand that they are trying to be true to their beliefs and their understanding of the Bible. I personally believe that God used some forms of evolution in the formation of life on earth, but I also believe that humanity was probably a unique creation. In any event, I reject the idea that God was not involved in the creation of the universe for philosophical AND scientific reasons.
Evolution is a fact. The theory of evolution is a theory. The two are different. It is a fact that the allele frequency in the gene pool of a population of organisms varies over time. This is the fact of evolution. The theory of evolution uses this fact to explain the wide variety of life observed today. It says that evolution leads to speciation. It explains that natural selection is the primary driving force behind evolution. You can argue that some detail of the theory of evolution is inadequate while still holding that evolution occurs. As of now, however, there is no competing scientific theory to explain evolution.