Masking and removing

[Dynamic Office]

Trying to follow this tuturial;

https://www.google.com/search?q=after+effects+track+and+remove&rlz=1C1PRFI_enGB732GB732&oq=after+eff...

And my mask is not acting like the person in the video's is, for some reason it's doing this;

 (Posted in comment below) 

Any help appriciated

[Dynamic Office]

[Rick Gerard]

What else is going on in the layer? Your screenshot does not reflect the tutorial at all. I would only give that tutorial a C. The workflow was not all that efficient and the explanation of tracking and using the clone tool left a lot to be desired.

When you post a screenshot select the layer that is giving you problems and press the U key twice to show us all modified properties. You could get results like that if you drew a mask then applied freeze-frame at a different time.

[Dynamic Office]

Thanks for you reply Rick, I've posted a picture below using U twice as requested.
All I'm doing to creating new comp > Press G for pen tool > Create mask shape > Subtract 

[Dynamic Office]

Any follow up? Still stuck with this