Filter points ?

Hi,

I have a tiny part to inspect and have to take the profile of the end of the tip (0.5mm width)
But, here is the thing, i've got my probed points:

{"data-align":"none","data-size":"custom","height":"250","width":"425","data-attachmentid":484966}

And here is what it looks like and the CAD:

{"data-align":"none","data-size":"large","data-attachmentid":484968}

I don't understand why PCDMIS persists to take points i don't need (the yellow arrows).
As there isn't any datum, the profile can move into the tolerance zone but those points doesn't allow it and it results in non-conform part...

I tried to play with the filter but didn't find something really better.
Is there a way to better filter points ?

I tried to shorten the scan but without good results, and the shorter the scan is, the harder it is to find the edge, or i have to place it manually.
I'm using PCDMIS 2018 and yes, that's a 2d profile scan.

sealevel you're right, i often use those added target to mask some partial scan on circles, i dunno how i can have missed that for a scan ! I'll try it !

The thing i don't understand is why PCDMIS shows me some probed points (picture1) that does not correspond to what it is shown on the analysis (picture2), pretty strange.

Thanks.