It's been a while since I've encountered anything like what you described. Probably because I'm used to building my own flight plans or downloading the most realistic AI plans I can find..........
I would say whether or not the "@" is a problem depends on how TTools responds when you run the Compiler. If arrival times are being inserted despite the "@," then there is probably nothing to worry about.
On the other hand, if the Compiler is giving you error messages, such as data being in the wrong place within a plan, you might want to take a closer look! I'm sure with your experience with TTools, you have already learned that there is a such thing as "bad" flight plans. This is what happens when someone uploads their work without taking the time (and effort) to do the job right...........
Good luck!!!
