evidence that intelligent design can't explain

DNA homology is supposedly due to intelligent design. Supposedly the similarity in gods creatures is due to god's reuse of genes (god's evidently fairly lazy, why build anything from scratch when you can take the easy path and just modify what you've got).whenever I hear this argument, I post this link;
http://www.talkorigins.org/faqs/molgen/ (i'm sure some of you have already seen it)then I ask them how intelligent design explains these types of homology. It usually just gets ignoredso, can an IDist explain to me why we and chimpanzees have identical errors in our GLO gene?(another thing that puzzles me about the whole homology is due to design thing is why god uses virtually identical DNA sequence's in closely related species to encode for the same gene, especially when you consider the redundancy in the code and the fact that there are probably several (hundred? thousand?) possible aa sequences which could produce a gene with the same function. I guess god is fond of the copy/paste function in his DNA editor)

okay, i'd like to thank mark for delving into peter's claims about this, I have to admit, I'm still getting my science degree, and some of this is above my head.Here is the question I would really like answeredWhere does the intelligent designer fit in?did he create the GLO psuedogene, replete with a mistake in both chimpanzee's and humans? - is this what you believe an intelligent designer did?

if you are going to allow for "unimportant imperfections" what use is ID as a scientific theory?if it only describes part of the genome, how are we to distinguish between sequences which are designed and which have evolved?