[c-nsp] Bug in stat counters with VLANs?

[Hank Nussbacher]

Running IOS-XR v.5.1.3 on ASR9010 and the "show interface" stats for
sub-VLANs seems to be totally off:

TenGigE0/1/1/7 is up, line protocol is up
  30 second input rate 6689925000 bits/sec, 738298 packets/sec
  30 second output rate 1330888000 bits/sec, 396078 packets/sec
 
TenGigE0/1/1/7.333 is up, line protocol is up
  30 second input rate 9324818000 bits/sec, 1133227 packets/sec
  30 second output rate 1273437000 bits/sec, 355218 packets/sec
  
TenGigE0/1/1/7.100 is up, line protocol is up
  30 second input rate 4164891000 bits/sec, 354715 packets/sec
  30 second output rate 80678000 bits/sec, 47826 packets/sec

Shouldn't the 2 VLANs total the same amount as the primary interface?   
Is there a bugid for this issue?


Thanks,
Hank