I have the same problem! I placed one with my little goddaughter, it got picked up by a newbie who cached only once (the day he found the cache). First I was really okay about it because he knew how to log it ... but unfortunately he has it now since more than seven weeks and has not been to the page at all.
I have emailed them and not gotten any reply. I am just sad because the holiday season starts and many peope are visiting the cache who cache regularly. But well ... guess this is just how it goes.
I recently saw a TB and I could have helped him 400 miles towards his mission. Went to the cache ... it was gone. It took the person three weeks to log it out, he kept it another couple of weeks and then he left it in a cache three miles down the road. Especially at holiday season I don't pick them up when I am not going anywhere.
But well ... we have made many nice experiences with our bugs as well ... so I think that this is what matters. In the worst case I will rerelease the bug in a couple of months.
Steph