How come she does not block my original facebook account?

long story few months ago was talking to a woman i know from higschool when i was living in florida we were talking for a few days months ago about our depression. but i get carried away wrote her too much. & she block me from sending her messages

but She did not block my profile why would she not block me 100%.

but like if i make a new account & message her i only did once she will then blocked the new account but not the old one.

How come she does not block my original facebook account?
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