As the others have mentioned the pictures aren't great. I initially didn't specifically notice the junk on the counters and cabinet doors open, but my first glance through left a feeling that the place was old and not in good condition. (FYI, I usually spend 2 seconds per pic when looking at stuff on CL and only look in more detail if it's interesting) Going back over the pictures, the kitchen isn't bad, just messy looking. The other pictures are odd and leave that feeling of being unprofessional (closet doors open, a pic of the corner with a bathroom door slightly open, etc). I'm not great at taking pics myself so I'd probably find someone to do it for me. You're in a college town, so maybe advertise to a local student to take the pics.
Also one of the ads is confusing and almost seems like a scam ad you see on CL. It's listed as a 3br for $1150, but in the ad text is says "$1,350 mo plus utilities (avg $175 mo) ... 2 bed for $1150" And you have an ad for the same place also on CL for $1400, with no pictures by almost identical text. As a renter these would be red flags that the place either a) is fake and is some sort of scam, or b) isn't managed well as the owner can't advertise it properly with different prices in multiple places.
Like others have said, I would get rid of these CL postings, get better pictures (take them or hire someone to) of clean rooms, and advertise heavily. You might also have to drop the price a lot just to stop bleeding money and figure out what to do next school year.
Good luck