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4507 switching question

I have an interface on a 4507 switch that was referred to me for the “LAST input/output”  counters on an interface not updating even though it is passing traffic. I realize that those counters will only increment for process switched traffic not hardware switched traffic. The ouput of a "show interface fa3/25 switching" only indicates packets incrementing for the "process" path, this means that my last input/output should be populated correct? Also curious about the other paths listed in this output and if the "Fast" counters are meant to increment for hardware switched packets. Output below, thanks for the help.

Switch>sh int fa3/25
FastEthernet3/25 is up, line protocol is up (connected)
  Hardware is Fast Ethernet Port, address is *****

  Description: ******

  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is RJ45
  input flow-control is unsupported output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 1y1w
  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 5000 bits/sec, 2 packets/sec
     29197604 packets input, 13967216316 bytes, 0 no buffer
     Received 1843003 broadcasts (1818787 multicast)
     0 runts, 0 giants, 0 throttles
     5 input errors, 5 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     93655138 packets output, 28989471131 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

Switch>sh int fa3/25 switching
FastEthernet3/25 ******
          Throttle count          0
        Drops         RP          0         SP          0
  SPD Flushes       Fast          0        SSE          0
  SPD Aggress       Fast          0
SPD Priority     Inputs          0      Drops          0

     Protocol       Path    Pkts In   Chars In   Pkts Out  Chars Out
        Other    Process          0          0    7519436  601554880
            Cache misses          0
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0
Spanning Tree    Process          0          0   56407520 3384451200
            Cache misses          0
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0
          CDP    Process          0          0    1879919  870402497
            Cache misses          0
                    Fast          0          0          0          0
               Auton/SSE          0          0          0          0

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Could be a bug on your IOS.

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