GS105E, GS108E, and WG102, all in a VLAN - how?

The logic on the GS105E and the 108E are a little strange in that to maintain Internet connectivity, all ports must remain an untagged member of VLAN1. The manual actually tells us to move ports to their appropriate VLAN as needed. But anyhow, I was able to work this through and the system works. So this is what I have accomplished:

1. Point of Sale terminals + their server on are VLAN3
2. Wifi AP is configured with 2 SSID's on VLAN1 and VLAN3, respectively
3. Wifi SSID on VLAN1 cannot ping or see anything on VLAN3 and vice-versa
4. Internet works on VLAN3 and VLAN1

However, two problems:

1. Wifi SSID on VLAN3 can see other devices, but cannot reach router/internet.
2. All the lights on all ports on the switches are blinking incessantly now. Is this normal? I'm used to the unamanged switches that blink only when a port is in active use.

To visualize:

Cisco RV082 router ----> GS108E ----> GS105E ----> (1) Server + (2) WiFi AP

The GS105E port to the WiFi AP is a VLAN member of 1 and 3, T
The GS105E port uplink to the GS108E is also T VLAN1 and 3
The uplink port from the GS108E to the Cisco RV082 is U VLAN1 and VLAN3

PVID's are 1 between all uplink ports, VLAN3 for all access ports.