Problems with eval(IdentifierName,#recall)

[compsystems]

Hello, the following statements executed line by line in the history of CAS view, show the following output [8, 8, id2, id1, id0, 8, 8], but within a program [id1,id0,id2,id1,id1,id1,id1] Why?

Please follow the following steps orderly to see the problem

1: [Shift]+[mem] /userVars, [DELETE]id0, id1, id2 & CAS Vars id0, id1, id2

2: firts goto CAS & HISTORY VIEW
2.1: id0:=8; id1:='id0'; id2:='id1'; [ENTER] // store id2,id1,id0 in the CAS environment
2.2: [ id2, eval(id2), eval(id2,0), eval(id2,1), eval(id2,2), eval(id2,3), eval(id2,4) ]; [ENTER] // returns [8, 8, id2, id1, id0, 8, 8]

3: then goto HOME & HISTORY VIEW // recall IDs in the CAS environment
3.1: { id2, CAS.eval(id2), CAS.eval(id2,0), CAS.eval(id2,1), CAS.eval(id2,2), CAS.eval(id2,3), CAS.eval(id2,4) } [ENTER] // returns {id1,id0,id2,id1,id0,8,8}

4: NOW AS PRGM return or goto CAS mode

4.1: purge(id0, id1, id2); [ENTER] before running the program, to delete pre-assigned data, although it should not be so, since ID0, ID1, ID2 are local variables within of prgm, why is it calling EVAL to global variables? If id0 is local, should call local ID0 and not global ID0

id2,id1,id0; [ENTER] //returns id2,id1,id0
4.2: RCLidsCAS(); [ENTER] // returns [id1,id0,id2,id1,id1,id1,id1] ?
id2,id1,id0; [ENTER] //returns id2,id1,id0
4.3: RCLidsHOME(); [ENTER] // returns [id1,id0,id2,id1,id1,id1,id1] ?

5: switch HOME VIEW
id2,id1,id0; [ENTER] //returns id2,id1,id0
5.1: RCLidsHOME(); [ENTER] // returns [id1,id0,id2,id1,id1,id1,id1] ?
id2,id1,id0; [ENTER] //returns id2,id1,id0
5.2: RCLidsCAS(); [ENTER] // the virtual calculator is locked and creates global variables, id0, id1, id2, why?

PHP Code:

#cas
    RCLidsCAS():=
    begin
        local id0, id1, id2;
        print;
        id0:=8;
        id1:='id0'; // OR id1:=quote(id0);
        id2:='id1';
        print("id2="+id2);wait;                     // "id2=8"           ok   id2 -> 'id1' -> 'id0' -> 8
        print("eval(id2)=" + eval(id2)  ); wait;    // "eval(id2)=8"     ok   id2 -> 'id1' -> 'id0' -> 8
        print(" ");
        print("eval(id2,0)=" + eval(id2,0) ); wait; // "eval(id2,0)=id2" ok   id2 -> 'id2'
        print("eval(id2,1)=" + eval(id2,1) ); wait; // "eval(id2,1)=id1" ok   id2 -> 'id1'
        print("eval(id2,2)=" + eval(id2,2) ); wait; // "eval(id2,2)=id0" ok   id2 -> 'id1' -> 'id0'
        print("eval(id2,3)=" + eval(id2,3) ); wait; // "eval(id2,3)=8"   ok   id2 -> 'id1' -> 'id0' -> 8
        print("eval(id2,4)=" + eval(id2,4) ); wait; // "eval(id2,4)=8"   ok   id2 -> 'id1' -> 'id0' -> 8 -> 8
        //sto(9,id2);
        return( [ id2, eval(id2), eval(id2,0), eval(id2,1), eval(id2,2), eval(id2,3), eval(id2,4) ] ); // [8, 8, id2, id1, id0, 8, 8]
    end;
#end 

export RCLidsHOME()
begin
    local id0, id1, id2;
    print;
    id0:=8;
    id1:='id0';
    id2:='id1';
    print("id2="+id2);wait;                     // "id2=8"                 ok   id2 -> 'id1' -> 'id0' -> 8
    print("eval(id2)=" + eval(id2)  ); wait;    // "eval(id2)=8"           ok   id2 -> 'id1' -> 'id0' -> 8
    print(" ");
    print("eval(id2,0)=" + CAS.eval(id2,0) ); wait; // "eval(id2,0)=id1" ok   id2 -> 'id2'
    print("eval(id2,1)=" + CAS.eval(id2,1) ); wait; // "eval(id2,1)=id1"   ok   id2 -> 'id1'
    print("eval(id2,2)=" + CAS.eval(id2,2) ); wait; // "eval(id2,2)=id0"   ok   id2 -> 'id1' -> 'id0'
    print("eval(id2,3)=" + CAS.eval(id2,3) ); wait; // "eval(id2,3)=8"     ok   id2 -> 'id1' -> 'id0' -> 8
    print("eval(id2,4)=" + CAS.eval(id2,4) ); wait; // "eval(id2,4)=8"     ok   id2 -> 'id1' -> 'id0' -> 8 -> 8
    //sto(9,id2);
    return( { id2, CAS.eval(id2), CAS.eval(id2,0), CAS.eval(id2,1), CAS.eval(id2,2), CAS.eval(id2,3), CAS.eval(id2,4) } ); // {id1,id0,id2,id1,id0,8,8}
end; 


6: goto HOME VIEW
6.1: purge(id0, id1, id2); [ENTER]
6.2: Now if you define variables in HOME VIEW
id0:=8; id1:='id0'; id2:='id1';[ENTER] // store id2,id1,id0 in the HOME environment
7: goto CAS VIEW
7.1: RCLidsCAS(); [ENTER] returns [8, 8, id2, id1, id0, 8, 8] Why? EVAL command, must first call the local variables and then the global variables