When you make changes in machine edition but don't download them to the PLC yet you get an inequality because whats in your PME program doesn't match whats in your PLC. That should clear up after you download. Also, depending on how the PLC is set up, you may want to check the box for "write to flash" to ensure your download takes. Sometimes the PLC is configured to boot from flash, and if you don't write to flash on download your new program will get blown away once you power cycle the PLC.