Problem with Arduino and INA226 power meter module
There is a discrepancy in pin terminology between your schematic &amp; what TI uses in their datasheets. I don't see anything in their datasheets using I+ or I-. I only see V+ &amp; V-. These 2 pins perform all your voltage &amp; current measurements depending on the "mode" you tell the IC to use.

As near as I can tell based on your schematic, you should be seeing the voltage reading based on what is applied between V+ &amp; V- (In your case, 3.3vdc) if you've told the chip to read the bus voltage channel. 

You should also be getting a current reading between the V+ &amp; V- pins if you've told the chip to read the shunt voltage channel. Since the part is designed for a full scale voltage differential of 36v between the V+ &amp; V- pins, I suspect a reading of about 10% of max (based on a 3.3v differential).

I confess to not knowing the board or its operation but having looked it up on the TI website, it does appear to have a few jumper settings &amp; a calibration routine to follow. There's a user guide on TI's website as well as the usual technical data pages. Perhaps those will assist in setting the jumpers correctly. ina226 data sheet &amp; eval board user guide
bc