相同输入的不同行为

有一个功能search

search(){
    echo "$1"
    # If directory -> recursion
    # If file and regex ok -> echo
    for file in "$1"/*; do
        ([[ -d "$file" ]] && search "$file" $2 ||
                 if [[ ( -f "$file" ) && ( "$file" =~ $2 ) ]];
                     then
                         echo "$file"
                     fi)
    done
}

如果你从命令行参数调用它：search "$1" "$2" ./s.sh . *，那么输出将是这样的：

> ./s.sh . *
.
./a
./aaa.mp3
./a_directory
./a_directory/aaa.aaa
./a_directory/another_file
./a_directory/b
./alala.txt
./alphabet.txt
./a.sh

但是如果直接通过设置参数调用search "." "*"，那么输出会是：

> ./s.sh . *
.
./a_directory
./a_directory/aaa.aaa
./a_directory/another_file
./a_directory/b

可能是什么问题呢？