Two Powerline Adapters In My Router/Modem

> [...] I've recently purchased a new Powerline adapter in addition to
> my current powerline that I use.

   As I understand these things, a pair of Powerline adapters emulates
an Ethernet connection, using power wiring.  What was _one_ Powerline
adapter doing for you before you got "a new Powerline adapter in
addition to [your] current powerline that [you] use"?

> Long story short, when I have both powerline adapters plugged in and
> connected to my devices, [...]

   Too short.  What, exactly, are your "my devices", and what, exactly,
is connected to what, exactly?  (Hint: If a device has multiple Ethernet
ports, then "connected to device" is not enough detail.)

   Do any of these Powerline adapters have makers and model numbers?

How did you configure them?