Baarle enclaves are numbered separatley in the 1995 treaty if they are truly separate or, in the case of one, joined only by a point to another. Those that are joined to another piece of their motherland by a non-point, ie by a real width of land, however small (and it is down to a metre or so in one case), are not considered 2 enclaves but one.
Thus by the Dutch-Belgium example of Baarle, Jungholz IS an enclave, being joined by only a point.
In other words, for practical purposes it is, as not even a phone wire can pass from motherland to enclave without violation of the host's territory
Brendan