Weird button behavior in 2.0

[Emmanuel Companys]

Just moved my stacks from 1.1.1 to 2.0 under macOS 10.2.6. The problems 
I encounterd seem to much to be due to RR bugs.
That why I'd would like to know whether some other user have had them 
too... and any suggestion to bring things back to normal!

A. Impossible to save one of the stacks (see my other post)

B. A weird button behavior:

1) In the msg box, after "put style of btn x" I get:
"standard, rectangle, roundrect, transparent, opaque, shadow, checkbox, 
radiobutton"
but in the inspector I read:
"Push Button, Square Button, Round Button, Transparent Button, Opaque 
Button, Shadow Button, Check Box, Radio Button"

2) Changing style by scripts works if I use the msg box terms; but 
nothing happens if I use the inspector's (no change, no error msg: 
nothing).

3) curiously, in a stack imported from RR 1.1.1,  if I try to change a 
button into a "standard" (by script) or a "Push Button" (in the 
inspector), I get a "rectangle" instead!  Impossible to get a  regular 
rectangle/Push Button.

4) When I open a button's inspector, the option menu to choose the 
style is labelled
"Type" in the case of menu buttons, and "Style" in the case of 
'conventional' buttons. But menu type is not treated as a subset of 
style (as it used to be in 1.1.1): when I type "put type of button x" 
(any menu style btn) I get:
'Message execution error:
Error description: Handler: can't find handler'
If I use the word "style", then I get "menu" no matter which 'type' it 
is. But nothing happens if I try to "set style of btn x to "menu"
So I can't test the exact style of a menu button by script.
Besides changing a 'conventional' into a 'menu' or vice versa if very 
tricky, if not impossible.

5) The height of the combo box is smaller than showed in the inspector: 
to get a combo box  the same height as a 18 p. option button box, I 
have to set it at 22!

Note that theese button oddities  (1, 2 and 4) were observed in a brand 
new stack as well.

Manuel