How can I get credit for answers I wrote in a sister site that were moved to superuser?

Question

I answered these questions in SO before they were migrated to SU:

How can I concatenate two files in Unix?

How to find the largest file in a directory?

My accounts are (or should be) linked. Why don't I get credit for this?

Answer 1

We just deployed a better method of tracking ownership across sites; you now own these answers.