I noticed, that sometimes the wireless network name gets mixed up in the luci app:
Linksys WRT1900ACS LuCI lede-17.01 branch (git-17.290.79498-d3f0685)
In 5Ghz, 3 Wireless networks SSIDs "SSID1","SSID2","SSID3".
Network with "SSID2" is disabled.
In Wifi list overview (https://[router_ip]/cgi-bin/luci/admin/network/wireless) is the deactivated wireless network with "SSID2" listed as "SSID3" and therefore, "SSID3" shows up 2 times.
Also on the LAN-Interface page (https://[router_ip]/cgi-bin/luci/admin/network/network/lan), in section interface, the actual "SSID2" shows up as "SSID3" (just as above).
The config (/etc/config/wireless) file is correct.
I take it as a bug, can anyone confirm this ?
PS: Ok, it's a known issue: https://github.com/openwrt/luci/issues/1179