Reason for inconsistency with Ohm's Law, of current measurements in resistor connected to battery circuit?
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The Amperemeter has an internal resistance Ramp of maybe 0.1Ω, to measure a voltage over it (that voltage is then shown as "Ampere" I=Vamp/Ramp), and more important, the battery also has an internal resistance, too. The 9V block in particular is made of six very small 1.5V cells, and their already high internal resistances add up due to the series connection.

The lower the resistance Rtest is, the more these low internal resistances matter.