嗨
i have a hotspot in 2.4 ghz. at user side i use tp-link 743nd (AP-Client).
in 743nd wan port is set to dynamic ip (from hotspot dhcp) and users can connect by tp-link wireless or lan.
the problem :
when user1 open a site the hotspot login page wants user name and password and then internet be connected.
now if another user on another computer try to open a site, hotspot page not shown and it has the internet of user1.

login by mac is disabled in hotspot.

Try to set static IP for TP-Link and a set it's network mode as bridge. then the end users who want to browse get the IP from Hotspot

it is not possible

Why? can you explain more?

this happen beacause your tplink is natting so the hotspot log the mac address and the wan ip of the router.
To solve the problem set the tplink as bridge instead of router

plug hotspot wire in lan port and thats it and disable dhcp in 741nd.