HL problem - New List returns same ID 2x

Ok situation -
I have 4 HL areas, hl_Display1 -> hl_Display4
these are declared as longints on form load

I use a generic routine to populate these HLs with records.
I populate hl_Display1 with records during load of the form

Selecting a list item loads selected item related records into 
hl_Display2 and so on through hl_Display4.
What I am finding is that the command

New List

is returning the same list reference 2 times.
(for example)
- on load of the form I populate hl_Display1 (list ID 2)
- I select an item from hl_Display1, which populates hl_Display2 (and 
gives it List ID 5)
- I select an item from hl_Display2, whch populates hl_Display3 ( ** 
BUT ** the command new list returns the list ID 5)

So now I have 2 list reference variables which have the same list 
reference (they shouldnt), of course now the entire interface is fubar.
-----
Additionally I have noticed, is this correct behavior?

Clear list (List_ref) -- leaves the list_ref longint value the same, 
and subsequent calls to New List fails to change this value.
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