Random numbers after net name

Hi, I am relatively new to ORCAD and I have a schematic which is on multiple pages and I have multiple nets that are having a random number assigned to them on different pages. For example, I have VDD_MUX on one page and then on the next page the net that connects to the VDD_MUX symbol has net name VDD_MUX_85685. 

No matter how many times I try to remove that number at the end, it always comes back. 

Can somebody please advise? 

Thanks