I highly doubt there is a misunderstanding of evolution here.
Basically the idea is that through genetic mutations, working along with natural selection, and accumulation of traits over time, species can develop from a common ancestor.
The idea is that DNA mutates and that these mutations create new traits, then natural selection preserves and passes on the traits most fitted for survival, and then over time this equates to new species.
a long process like this is not observable directly, and cannot ever be proved, it is simply accepted by faith, you're placing your faith in the faith that other scientists have in evolution basically, at best evolution is a theory, but it is highly dishonest for it be presented as if it's some scientific fact.
It's really annoying when evolutionists accuse creationists of being ignorant of how evolution works, the problem is not that we don't understand, but that we do understand.
There are scientific problems with evolution.
Darwin said something along the lines of "if any biological structure or function can be shown that numerous,successive,slight, modifications could not account for, then my theory would utterly break down"
The bacterial flagellum is an example that fits this, the flagellum is basically a efficient motor, it has a. tons of parts that serve no independent function. and b. parts that must all be present at the same time to function. numerous,successive, slight modifications (random mutations accumulated over time) cannot account for all these different parts, each individual part serves no purpose on it's own, therefore there is no reason for any of these parts to evolve on their own. which is ridiculous. and the other problem is all that all of these parts (which by the way are extremely complex in and of themselves, simply do a study on how proteins are synthesized) must evolve at the same time, or else the flagellum does not function. it's like the equivalent of have a pile of metal in a scrapyard being blown around in the wind and all of the pieces coming together over millions of years to form an airplane.
This is called the "Irreducible Complexity" argument.
There is also an argument called the design inference, but this being a baptist website I don't think it necessary.