Apps Script, difficulty on trigger action when 2 values match

Question

Here is my code:

  var spreadsheet = SpreadsheetApp.getActive() ; 
  var sheet1 = spreadsheet.getSheetByName('ANULAR') ;
  var sheet2 = spreadsheet.getSheetByName('PQ') ;

  var todos = sheet1.getRange("D7").getValue();

  var sqlData = sheet1.getRange("P4").getValue();

  var cant = sheet1.getRange("R4").getValue();
  var idpnqsAnular=sheet1.getRange("T6:T20").getValues();
  var idpnqs= sheet2.getRange("A:A").getValues();


  if (todos==true){

    for (var i=0;i< idpnqs.length;i++){

      for (var j=0;j<3;j++){

        var a1=idpnqsAnular[j];//just for control on debugging
        var a2=idpnqs[i];//just for control on debugging
        var isIt=idpnqsAnular[j]==idpnqs[i];//just for control on debugging

        if(isIt){          
          sheet2.getRange(i+1,6).setValue("CANCELADA");         
        }  
      } 
    }
  }
}

The basic idea is: I have a list of codes in var idpnqsAnular that I wanna delete in sheet2 when found.

That's why I iterate over idpnqs, and inside that for loop I iterate again over my list of codes. When the value on the ouside loop is equal to the value on the inside loop, in column 6 the value is changed to "CANCELADA" (cancelled in spanish). Problem is, the code never evaluates the values as equal, even when they are.

Here some captures from the debugging:

Even when a1 and a2 (variables created only for this detail on debugging) are exactly the same, the variable that compares them (isIt) evaluates as false.

Please, if you find the error, enlight my stupidity.

Thanks in advance