Ordering of channel operations

I highly doubt the order of channel operations in the System Viewer section of the HTML report follows the actual order implemented by the compiler; the drawing probably prioritizes minimizing space used for the figure, rather than accuracy with respect to order of operations. I would go ahead and just compile and run the kernel to see if it actually gives incorrect results. You can also try adding a barrier in-between the two channel operations as a test to see if the order of the operations will change in the report.