That's the way of it till you get familiar with all the tricks. Those simple mistakes are a great way to learn. You seem to be coming along. Well done.
Recommend that you mod one file (or set of files) at a time to minimize your pain and suffering during troubleshooting. Keeping good notes isn't a bad idea as well.
cecilzero, I see in you sig that you have retired from FT....what's up wuth that.