Failed to build Instrumentation Amplifier
There are a few issues you have to solve regarding the first circuit. For the second, I will only comment that it seems that you have shorted the opamp output to ground (via the oscilloscope ground clip), but it may be parallax error in trying to understand the circuit from the picture.

To see positive and negative voltages at the outputs (including the internal nodes), you need a symmetric power supply

If I applied correctly the information on your text to the schematic, there is gain in both stages, so:


$${A_v} = \left (1 + {2 R_1 \over R_\mathrm{gain}} \right ) {R_3 \over R_2} = \left (1 + {2 \times 3.3 \over 1} \right ) {3.3 \over 1} = 25.08$$

From the datasheet, the opamp inputs should be within this range:


Which means 0 V to 3 V with your current power supply. You have not shown the input in the schematic, but if there is no DC offset, the negative part of the input is lost (but also some of the positive part - see below).

Another problem is that the outputs (including the two opamps in the first stage) should remain within:


Again, this must also be valid for the three opamp outputs. This means that the lower opamp at the input is basically dead (its output maximum value would barely reach the valid range).
If the differential input is 50 mV (peak) the peak-to-peak output voltage will be aprox. 2.5 V. This doesn't leave much room unless you can apply a DC voltage to the input and output signals, which could be something like this:

It seems it would be much easier to use a symmetric power supply.