MIkrotik Hotspot and TendaW308R WirelessWan

I have a a tenda router w308R(192.168.0.1) and i connected this router via wireless wan to my mikrotik hotspot (192.168.1.1). My hotspot users only have 1 shared user , ` hotspot account one client. The problem is when the my client connects to my tenda router via wifi, instead of having 1 shared user, multiple phones and laptops connected to the tenda router can now login using only a single account.Multiple clients can now login with only one hotspot user. But if they login to my mikrotik wifi , it works fine. somebody help me. I think it can be a loophole to any mikrotik hotspot.