Internet connection drops for 4-3 second every few moment

Finally, they gave me the Write access to my AP. I’m still unable to make Supout.rif
Thanks to the topic below, I just changed RSTP to STP and everything seems solved.
http://forum.mikrotik.com/t/short-but-periodic-packet-loss-on-2xsxtsq-ac-link/149367/1
I still have a few problems and need help with those.

  1. I get some weird ping spikes.
  2. I want to have access to my AP without turning my WAN port into LAN port on my Router.