For whatever reason, the Gargraves sectional track doesn't always some in exactly on size like most other sectional track does. I've heard from more than one source that the Gargraves sectional curves aren't always "exactly" the same length, which would certainly explain the issue. I know that the Ross O72 sectional curves I have, Atlas sectional track, and any Fastrack track I've used in Anyrail come in spot-on to the plan.
Of course, unless you go to considerable lengths to make the flex track EXACTLY as you represent in Anyrail (or any other track layout package), that won't match up exactly as well. Personally, I can't see how anyone lays flex to be EXACTLY like what you represent in in a layout package, but I'll bet it's a PITA to do if it's possible! I just try to get it close and leave it at that.
