RFID Issues.... HELP !!!!!

[EarlyBird2]

FOR tagNum = 1 to 4			' scan through known tags
    FOR idx = 0 TO 9				' scan bytes in tag
    READ (((tagNum-1) * 10) + idx), char	' get tag data from table
    IF (char = buf(idx)) THEN loc1
    IF (char = buf(idx)) THEN loc2
    IF (char = buf(idx)) THEN loc3
    IF (char = buf(idx)) THEN loc4
    Next
    Next
    goto main

If you scan a card with "1" as the first character three doors will open? No always the first will open.