Does anyone know the answer to this MEPS question?

I had an ACL operation back in 2006. I went through physical therapy and all that. My knee is a little stiff at times but other than that it is 110%. I also had asthma when I was between the ages of about 5 and eight. Im trying to enlist in the Navy. I've already taken the ASVAB. All im waiting on now is for MEPS to review my Medical records and clear them for me to be able to get a physical.My recruiter sent in the records once but it had been over thirty days. And the people at meps said the records had been misplaced. We sent the records back again on Monday and today is Wed. There is a good bit of doentation on my knee but nothing really serious. Why is the process taking so long? Will I still be able to join? WIll they deny me because of my knee surgery? Any former recruiters or MEPS personnel answer. Feel free.