Lingfield has been classified as a Flat meeting - despite a few races being run on the AW track.
As TBE only recognises the course type at the meeting level - Lingfield is seen as a Flat meeting and therefore no Lingfield races will appear in the Races grid if you are only filtering by AW races.
You can workaround this by temporarily selecting Turf (as well as AW) on the Events tab and reloading the races. You will then have to untick any unwanted races in the race grid to ensure that you only bet on AW races.
Bringing the course type down to a race level is currently being worked on and it will (hopefully) make it into the next release.
Alistair