I have tried restarting the LM, but this did not resolve the issue. When you say to keep only the licenses which are valid, do you mean to delete the invalid license files off the computer, or to delete the invalid portions in the ansyslmd.ini file which currently contains several licenses within it?
Below is the full file from the previous screenshot. The file, generated by the Optics Launcher, was named lisence.lic, and when had uploaded it to the license manager it instructed me to append it to the original license. I do notice now that while not explicitly labeled as disk serial number, the number immediately following the server name does not match the serial number in the original license file. The modified license file (with the below appended onto it) does match the original serial number.