The TSU9600 sends its signals much faster than the remotes in the Pronto NG line do. As such, I found that I had to add a .1 second delay action after each digit code in my XCF to ensure my equipment was able to keep up when receiving digit codes back to back. Adding delays in this fashion for channel macros is recommended anyway, though I've never needed to do this for the Pronto NG remotes I've owned. If your channel macros simply contain links to IR code buttons by the way the easiest thing to do is go to the action lists for each of your IR code buttons adding the .1 sec. delay action to each just after the learned IR code. This will save you from having to go to each of your channel macros adding the required delay actions in between each of the digit IR codes you are linking to.