The bridge and VLAN setup is horrible and has several of the errors described here https://wiki.mikrotik.com/wiki/Manual:Layer2_misconfiguration.
The simplest method would be to use a single VLAN-aware bridge - there is a good primer on Mikrotik VLANs http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1 and there are skeleton examples in the Wiki.
If you need wire-speed switching between ethernet ports on the hAP AC lite you can use a single non-VLAN-aware bridge and configure the switch chip, but be aware that the switch chip does not support hybrid ports.