Excluding future-dated files in 'find' on Cygwin

This relates to 'find' on Cygwin.

I often force the mtime on some files to be in the future so that they
will always appear at the top of a directory listing by reverse date
which is my preferred format in Windows. This lets me leave notes to
myself that will always be at the top of the list.

I tried to keep 'find' from reporting these files using the following
command line:

find ./ -mtime +0 -mtime -1

but this found nothing. When I changed it to:

find ./ -mtime 0 -mtime -1

it worked as desired and found all files less than a day old and not
future-dated.

Can someone tell me, please, if this is a bug or the expected behaviour.

Thanks