I'm glad I'm not the only one that this is happening to. But, the rapidity of the resumption of the upload convinces me that the user trying to obtain the file isn't seeing the interrupted transfer and clicking on the resume button. It happens too fast for that.
I suspect this is part of the code in Limewire, perhaps related to the GET ANY command, where Limewire keeps trying to get a completed upload by visiting different "servers" - once it finds one, it needs to STOP and let the upload proceed.