Yes your configuration of vlans is out to lunch… I am surprized anything works …
For me to assist I would need to know…
Which VLANs go to which ports?
Which Ports are only for the 192.1.68.88 subnet ?
Which ports are going to smart devices that can read either tagged vlans or a combination of one untagged vlans and multiple vlans?
THis is the model to be followed in general…
http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1