I use LW 5.1.2 and Mac OS 10.5.6
The same title will be repeated several times in a row, or separated by one or two other songs, and this will happen over and over. Right now one 13 times and one 8 times. I can't tell if it is the same IP address or not as the IP address disappears once it is "done uploading". It makes for a long list of uploads which I believe is incorrect.
With the older versions of LW this did not happen.
Is this just a fault of the program?

Chances are that it's just people uploading a file from you, disconnecting the download (or getting disconnected) & then continuing the download again. Are you firewalled? Were you firewalled when using LW 4? Has there been any change in your setup, apart from updating LW?

Each version of LW behaves differently & LW 5 is very different to LW 4... maybe upload behaviour has changed in the new version? I've seen the same kind of thing in Windows, though not to the same degree that you've mentioned.

You could ask over at the developers' forum - one of the devs might be able to explain more.
LimeWire Forums

Thanks birdy. LW5 is rather strange. Much prefer the older format.