PDU Amp history graph

Hello,
I am using the Dude in order to sample Dozens of APC PDUswith snmp
I have successfully monitoring the Amp parameter using specific Oid,and it great

The problem is that I cannot check the history, because the history graph showing seconds on the ‘Y axis’ instead the Amper values

I don’t have a clue what whats wrong…

just to be cleared, the Amp that is see are the right one so I have only the graph issue…

I will be grateful for any help you can provide
PDU_graph1.jpg