[CAS] Problems with increased powers of polynomials (coeffn*x^n±c2*x^2±c1*x^1±c0*x^0)

[compsystems]

Examples:
1:

[FLags] Output Simplify: None. Increasing: Off
entry line: x^2+x^1-x^0 [Enter] returns x^2+x-1 (OK)

1a: [FLags] Output Simplify: None. Increasing: On
entry line: x^2+x^1-x^0 [Enter] returns x^2+x-1 (Why?)

the system (CAS) does not consider the increase flag, which must be made at the end of process, you agree with this?

1b: [FLags] Output Simplify: Minimun. Increasing: On
entry line: x^2+x^1-x^0 [Enter] returns -1+x+x^2 (OK)

1c: [FLags] Output Simplify: Maximun. Increasing: On
entry line: x^2+x^1-x^0 [Enter] returns x^2+x-1 (Why?)

now with reorder function

1aa: [FLags] Output Simplify: indifferent (None or Minimun or Maximun). Increasing: On
entry line: reorder(x^2+x^1-x^0,[x]) [Enter] returns -1+x+x^2 (OK)


1bb: [FLags] Output Simplify: indifferent (None or Minimun or Maximun). Increasing: OFF
entry line: reorder(x^2+x^1-x^0,[x]) [Enter] returns x^2+x-1 (OK)


2:
2a: [FLags] Output Simplify: None. Increasing: On
entry line: x^2*y^0+x^1*y^1-x^0*2*y^2 [Enter] returns x^2+x*y-2*y^2(Why?)


2b: [FLags] Output Simplify: Minimun. Increasing: On
entry line: x^2*y^0+x^1*y^1-x^0*2*y^2 [Enter] returns x*y+x^2-2*y^2 (OK)
but [For next firmware] Default X increases, it should be able to specify the variable work or main var or increasing var: X or Y, Z ...
PLEASE INCLUDE THIS NEW ITEM, IN CAS CONFIGURATION
This option is available in the CAS of HP50G and HP49G +
Independent varible name: X, Y ...

2c: [FLags] Output Simplify: Maximun. Increasing: On
entry line: x^2*y^0+x^1*y^1-x^0*2*y^2 [Enter] returns x^2+x*y-2*y^2(Why?)


now with reorder function

2aa: [FLags] Output Simplify: indifferent (None or Minimun or Maximun). Increasing: On
entry line: reorder(x^2*y^0+x^1*y^1-x^0*2*y^2,[x]) [Enter] returns -2*y^2+x*y+x^2 (OK)



2bb: [FLags] Output Simplify: indifferent (None or Minimun or Maximun). Increasing: OFF
entry line: reorder(x^2*y^0+x^1*y^1-x^0*2*y^2,[x]) [Enter] returns x^2+x*y-2*y^2 (OK)

3:
3a: [FLags] Output Simplify: Maximun. Increasing: On

(x^2+x*y-2*y^2)*(x^2-2*x*y+3*y^2) =>

x^4-x^3*y-x^2*y^2+7*x*y^3-6*y^4 =(