That is a known issue that 3.53 has, you can fix this by upgrading to 3.54 beta 4 which you can simply replace the winmx.exe file in your C:\Program Files\WinMx\Winmx.exe .
httpss://archive.winmxworld.com/WinMX/Beta/3.54%20betas/winmx354beta4.zip
Or you can put a patch that was made for this bug by KM, just drop this into your WinMx folder and restart.
httpss://archive.winmxworld.com/KingMacro/WinMX%20Patch/olepro32.dll%20(Mk%202).zip
You should also see better resutls on your Channel Lists if you use that fuction as well.