PPPOE-Server duplicate sessions problem

RouterOS Beginner Basics
2

Use RouterOS 6.7 and this script:

Check locked PPPOE, PPTP, L2TP, SSTP, OVPN* PPP* connections (on Server side)
http://forum.mikrotik.com/t/check-locked-pppoe-pptp-l2tp-sstp-ovpn-ppp-connections/75396/1

and set ONLY ONE connection for username.