Domain Mapping Propagation

I mapped 2 domains in my multi site 4-5 days ago. I had support help me and I really feel I did everything correct. The sites have been coming up for an hour or so and then going back down consistently for 4 days now. I have built about 50 sites and I have never had propagation take this long. Any thoughts? The sites are and both sites are not finished but I was just testing the domain mapping to see if it would work.