Fred,
Thanks for all the access to your site. We can definitely repeat the problem on your site and are trying to recreate it on one of our development sites. Basically, if we set the Current Position fields in JomSocial to be required and show during registration and then, in JLinked, have it show the fields during registration, the values will be properly pulled in.
That means, there may be a bug with JLinked when importing fields that aren't visible. We test a lot with that configuration, but it's possible there's some mix of settings that's causing the problem.
We'll let you know what we find, and hopefully should have a solution over the next few days. As a reminder, we have a 30-day money back guarantee, and you're not very far into your subscription. Should you ever choose to get a refund, we'd completely understand, just let us know! Hopefully, we'll get you fixed up very soon though.
Thanks,
Alex