EGGW requires you to enter the runway and taxi to one end and turn for take-off. So your afcad must have a runway link that turns at the turning points. Also EGGW has three runway entry points so there is a risk of you being given an entry point further down the runway. So a combination of this might cause TGS to give incorrect information. Also check taxiway Alpha. I have two taxiway alphas. There should only be one. So one needs to be deleted and the other extended.
Taxiway Alpha passes through the main apron and becomes Taxiway Echo. I might suggest breaking the link there. For rwy 08 you should have "Taxi via Alpha, Bravo."