Hello,
1. go to download screen and delete the file at 100% but not complete
2. exit from limewire
3. restart limewire
4. go to incomplete and resume the download,
usually the file begin the verifying process

I tried the suggestions posted in response to my question, but for some reason I could not get them to work. I ended up completely deleting those two files from the Incomplete folder on my hard drive and restarting the searches for them from scratch, and both downloads completed fully this time. I suppose we can chalk it up to a quirk in the network. Thanks, y'all!