Is there an explanation why RECCOUNT() doesn't return the right value in the following code ?

create table t1 (f1 C(1))
insert into t1 (f1) VALUES ("A")

create table t2 (f1 C(1))
insert into t2 (f1) VALUES ("B")
index on f1 tag f1

select "t1"
scan
	SELECT * FROM t2 WHERE f1 = t1.f1 INTO CURSOR tmp
	? reccount()  && display 1
	? _tally      && display 0
endscan

RECCOUNT() returns 1 while it is supposed to return 0. This problem occurs only if you create an index on f1 in table t2. Without the index, it returns 0.

Thanks.