Symbol errors versus CRC errors

Hello,
I have a follow up question about this!

Why dont the input errors add up correctly? Here I can see some CRC errors and 0 other input errors whihc don’t get added up to result in the mentioned number of errors! Where are the missing ones?

Broadcast address is 255.255.255.255
  Address determined by manual configuration
  IP MTU 1500 bytes , BW 10000000 kbit
  Full-duplex, 10Gb/s, auto negotiation: off, uni-link: disabled
  Up 175 days, 1 hours, 23 minutes, 15 seconds
  Loopback Mode : None
  0 link status changes since last clear
  Last clearing of "show interface" counters 20:40:14 ago
  5 seconds input rate 2.08 Mbps (0.0% with framing overhead), 1634 packets/sec
  5 seconds output rate 504 kbps (0.0% with framing overhead), 718 packets/sec
     29940890 packets input, 4898352528 bytes
     Received 0 broadcasts, 7623 multicast
     4 runts, 0 giants
     54 **input errors, 38 CRC, 0 alignment, 0 symbol, 0 input discards**
     0 PAUSE input
     12491385 packets output, 1117699471 bytes
     Sent 0 broadcasts, 2481 multicast
     0 output errors, 0 collisions
     0 late collision, 0 deferred, 0 output discards
     0 PAUSE output