Different results using OCCURS with different compilers

I'm attempting to output the following row using DISPLAY and am getting the correct result in Micro Focus COBOL in Visual Studio and the Tutorialspoint COBOL compiler, but something strange when running it on a z/OS Mainframe using IBM's Enterprise COBOL:

01 W05-OUTPUT-ROW.
   05 W05-OFFICE-NAME PIC X(13).
   05 W05-BENEFIT-ROW OCCURS 5 TIMES.
       10 PIC X(2) VALUE SPACES.
       10 W05-B-TOTAL PIC ZZ,ZZ9.99 VALUE ZEROS.
   05 PIC X(2) VALUE SPACES.
   05 W05-OFFICE-TOTAL PIC ZZ,ZZ9.99 VALUE ZEROS.

It appears in Enterprise COBOL that the spaces are being ignored, and is adding an extra zero-filled column even though the PERFORM VARYING and DISPLAY code is the exact same in both versions:

PERFORM VARYING W02-O-IDX FROM 1 BY 1
   UNTIL W02-O-IDX > W12-OFFICE-COUNT

   MOVE W02-OFFICE-NAME(W02-O-IDX) TO W05-OFFICE-NAME

   PERFORM 310-CALC-TOTALS VARYING W02-B-IDX FROM 1 BY 1
       UNTIL W02-B-IDX > W13-BENEFIT-COUNT

   MOVE W02-O-TOTAL(W02-O-IDX) TO W05-OFFICE-TOTAL
   DISPLAY W05-OUTPUT-ROW
END-PERFORM

W13-BENEFIT-COUNT is 5 and never changes in the program, so the 6th column is a mystery to me.

Correct output:

Strange output:

Edit: as requested, here is W02-OFFICE-TABLE:

01 W02-OFFICE-TABLE.
    05 W02-OFFICE-ROW OCCURS 11 TIMES
    ASCENDING KEY IS W02-OFFICE-NAME
    INDEXED BY W02-O-IDX.
        10 W02-OFFICE-CODE PIC X(6).
        10 W02-OFFICE-NAME PIC X(13).
        10 W02-BENEFIT-ROW OCCURS 5 TIMES
        INDEXED BY W02-B-IDX.
            15 W02-B-CODE PIC 9(1).
            15 W02-B-TOTAL PIC 9(5)V99 VALUE ZERO.
        10 W02-O-TOTAL PIC 9(5)V99 VALUE ZERO.

and W12-OFFICE-COUNT is always 11, never changes:

01 W12-OFFICE-COUNT PIC 99 VALUE 11.

I'd be very hesitant about mixing VALUE with OCCURS and re-code the WS as

01 W05-OUTPUT-ROW.
   05 W05-OFFICE-NAME  PIC X(13).
   05 W05-BENEFITS     PIC X(55) VALUE SPACES.
   05 FILLER REDEFINES W05-BENEFITS.
     07 W05-BENEFIT-ROW OCCURS 5 TIMES.
       10 FILLER       PIC X(02).
       10 W05-B-TOTAL  PIC ZZ,ZZ9.99.
   05 FILLER           PIC X(02) VALUE SPACES.
   05 W05-OFFICE-TOTAL PIC ZZ,ZZ9.99 VALUE ZEROS.

Perhaps it has something to do with the missing fieldname?

Ah! evil INDEXED. I'd make both ***-IDX variables simple 99s.