SNMP NMS issue

[CCIS]

We came across an issue with error logs in our NMS with collecting data from 50+ Netonix switches. Before posting we found a similar issue without any reply:
viewtopic.php?f=17&p=28922#p28922

Basically, this is the problem:
# snmpget -v 2c -c xxx 10.21.250.2 1.3.6.1.2.1.2.2.1.5.1
iso.3.6.1.2.1.2.2.1.5.1 = Gauge32: 1000000000
# snmpget -v 2c -c xxx 10.21.250.2 1.3.6.1.2.1.2.2.1.6.1
iso.3.6.1.2.1.2.2.1.7.1 = INTEGER: 1
# snmpget -v 2c -c xxx 10.21.250.2 1.3.6.1.2.1.2.2.1.7.1
iso.3.6.1.2.1.2.2.1.7.1 = INTEGER: 1

Look at the 2nd request. I request xxx.1.6.1 and I get a reply with 1.7.1 ?¿

This seems to go against SNMP norms. For example, quoting http://oid-info.com/get/1.3.6.1.2.1.2.2.1.6 "For interfaces which do not have such
an address (e.g., a serial line), this object should contain an octet string of zero length."

Any comments from Netonix on the reason for this? Would be very helpful to have this fixed!

Currently using FW 1.5.14

[Omniflux]

Previously reported here