Formulas expected behaviour for Modeling Spreadsheet

[Andersen07]

I never used Modeling Spreadsheets before and I'm wondering if I'm having the expected results for it.
According to the docs, it seems that if I create a Spreadsheet (in NX > Tools > Spreadsheet), formulas that I type in the spreadsheet should be two-way translated (from spreadsheet to NX expressions and from NX expressions to spreadsheet). So I tried:
[ol 1]
[li]In NX, created two parameters (Tools > Expressions): "width = 10" and "height = if (width >= 10) then (5) else (20)".[/li]
[li]In NX, created a Spreadsheet (Tools > Spreadsheet).[/li]
[li]In Excel, selected cell A1 and clicked Add-Ins > Extract Expr.[/li]
[/ol]
I expected "width" to have formula "= 10" and "height" to have a translated formula "=IF(width >= 10; 5; 20)", but instead I got "height = @exprval("height")".


The other way around is even worse. If I:
[ol 1]
[li]In Excel, change "height" expression to any Excel formula, like "=SUM(D17)" (which results in 170)[/li]
[li]Save spreadsheet, click Add-Ins > Update NX Part and close the spreadsheet[/li]
[/ol]
When I open the Expressions window (NX > Tools > Expressions), I get "height = 170", without any functions, just a bare value.
If I then reopen the Spreadsheet (NX > Tools > Spreadsheet) and click Add-Ins > Refresh Expr, it refreshes "height" to "= 170", which makes me lose all the Spreadsheet logic whenever I refresh the expressions.

Protecting the desired cells to maintain their formula have no effect.

I'm using NX 1980 and Excel 365
Is this the expected behavior?
Thanks

Edit: included NX and Excel version

 

[cowski]

What version of NX are you using?

www.nxjournaling.com

 

[Andersen07]

cowski,
I forgot to mention. Just edited my original post to include that info. NX 1980 and Excel 365.