Hi libby1
Just wondering why you are counting ie does it matter? I would have said a bit of spotting is neither here nor there and if you are not taking HRT and don't plan to then I presume you will want to know at what point bleeding is counted as post-menopausal so you will want to know the date of your last period? Therefore on the grounds of erring on the side of caution I would discount it and if you get another episode of spotting/bleeding, say, more than 12 months after your last period - I would pop along to the doc and let them decide whether to refer you for a scan.
If you plan to take HRT - then it doesn't matter at all - except just keep a note of it so you can remember what was happening if you look back.
Hurdity x