Hi,
It looks like the Scrace family were living in Tunbridge Wells by 1861, although the census is confusing because is states town of Tonbridge, parish of Frant, the address given I think reads Rumber Street, Frant Reach.
So I think you're correct there does seem to be alot of boundary flex between Ticehurst / Frant / Tunbridge Wells.
By 1871 the family are on the census in Town of Tunbridge Wells, parish of Tunbridge Wells, address looks like Balti Street.
The 1881 census gives Alice as married to William Webb, living in Tunbridge in Garden Street.
I have searched every area for their marriage, but just can't find it.......