How many "Steam Along" Thomas variations?

My biggest gripe with the steam along Thomas is, because it's Annie that is driven & Thomas is pushed, the activation tab for the tracks is positioned under Annie, this makes it totally unsuitable for the playrail auto switching track, Thomas is already across the points before the tab activates the changeover and you end up with a derail,
I do like the sound & steam Thomas but I just think that if it had been thought out a bit better they would have left the tab off completely.