Wiring – Honeywell RTH6500 WiFi Thermostat wiring questions for a heat pump

I'm trying to install a new Honeywell RTH6500 thermostat on an old heat pump system that has regular plus emergency heat and the closest matching diagram says to put both the white "W2" wire and black "E" wire into the same port called Aux/E. (pic attached of instructions page)

Questions:
1.) Is this right?
2.) Can regular and EM heat work off of the same port? (W2 & E wires in same port)
3.) I get all the other wiring matchups (I think) but what am I missing?

Here is what I have on my old system: (Some of the labels could be wrong here)(pic attached with wires still installed on a regular Hunter Thermostat)
G__C__O__W2__E__R__Y1

G = Green wire
C = Blue wire
O = Orange wire
W2 = White wire
E = Black wire
R = Red wire
Y1 = Yellow wire

The New Honeywell RTH6500 has two wiring rows for Conventional or Heat Pump: (pic attached)
Top Row – Conventional: K__Y2__W2__G__W__C__Y__R/Rc
Bottom Row – Heat Pump: K__L__AUX/E__G__O/B__C__Y__R/Rc

What goes where? W2/White and E/Black are mysterious.

G to G on RTH6500 = Green wire
C to C on RTH6500 = Blue wire
O to O/B on RTH6500 = Orange wire
W2 to W2??? on RTH6500 = White wire
E to ??? on RTH6500 = Black wire
R to R/Rc on RTH6500 = Red wire
Y1 to Y?? on RTH6500 = Yellow wire

Thank you very much for your help!
Scott

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