It is hard for me to tell, as your template may vary.  That does appear to be the correct spot, try it out and see what happens.

Make sure you are backing up for wordpress database and install before you go changing this stuff.

In wordpress editor, edit archives.php, find the following code block and change as needed:

 <code># term->Title(); ?></code> 

Click on "Export to csv" in the top right hand corner of your crawl report.

When the file downloads, there is a field called "referrer" which will tell you the exact page the broken link was found on.

I think it all depends on your needs and capacity.  If you're asking the question "Are SEO and SEM different enough to merit two different positions?", then the answer is a resounding "Yes".  Unfortunately this isn't possible for a lot of businesses so they have to look for someone a little more well rounded.  If you can afford it and you have a decent sized business/funding, then yes, you should hire them as separate people.

In our case we are able to have both and so we do.  Both of them are knowledgeable in both areas but each prefers his own job respectively.  It's nice to have two people to bounce ideas and responsibilities off each other, if they are the right people they will work well together and do much more for your business than one alone.