There is a big problem with the theory that birds evolved from dinosaurs using the Archie, Sino and other fossils and the cladogram shown. Along with the cladogram, goes the following:
Cladograms depend on two main scientific ideas. The first is that time flows in one direction only. The cladogram represents this by moving strictly from left to right. Thus, common ancestors of related groups must arise prior to these descendants in time, just as in genealogy parents arise before their children. Just as parents cannot inherit characteristics from their children, an hypothesis of ancestry requires that the “ancestor”; occurred earlier in time than its first “descendants.”
The fossil dates, as you have noted, deny the cladogram.