ADS1299 common-mode interference problem ?

We are trying to replicate OpenBCI using our own circuitry, and we are running into a significant issue with the ADS1299 signal. There seems to be a big interference coming in from SRB2 when trying to use channels 1N to 8N. I've soldered the onto a PCB according to the data sheet and double checked if the VREFP - VREFN = 0.5V, but when I turn it on and just run my fingers through the pins, i get absolutely no change in signal output. It's like there is some other noise artifact that is dominating the signal but I don't know what to do from here, I have a feeling there is some interference coming from SRBx but I'm unsure. Any help is appreciated. Did you guys run into this problem when making the OpenBCI hardware?

This is what the signal looks like over 8 channels when using 24x gain, bias signal generation, SRB1 disabled, and SRB2 enabled.The values are scaled to uV using Table 7 in the datasheet. Electrodes aren't connected to anything, just occasionally running my fingers on them during data collection but i'm seeing absolutely no changes in the signal, just this:

-1270.5625,-1275.5022,-1270.8531,-1276.2175,-1268.2156,-1273.1106,-1271.0767,-1273.0883
-1270.5178,-1275.4799,-1270.7413,-1276.128,-1268.2603,-1273.1553,-1271.0095,-1273.0659
-1270.4731,-1275.4799,-1270.6295,-1276.0164,-1268.3049,-1273.1553,-1270.9872,-1273.0659
-1270.5625,-1275.5022,-1270.6967,-1276.1505,-1268.3497,-1273.0883,-1270.9872,-1273.1106
-1270.5625,-1275.4128,-1270.8083,-1276.1505,-1268.2826,-1273.0212,-1270.9425,-1273.0659
-1270.6072,-1275.3235,-1270.652,-1276.128,-1268.1709,-1273.0883,-1270.9648,-1273.0659
-1270.5625,-1275.301,-1270.6743,-1276.1952,-1268.2156,-1273.1776,-1271.0095,-1272.9766
-1270.6072,-1275.234,-1270.7413,-1276.1057,-1268.2826,-1273.0659,-1270.9648,-1272.9766
-1270.5848,-1275.301,-1270.8083,-1276.0834,-1268.1709,-1273.0883,-1270.8755,-1273.0436
-1270.6295,-1275.4128,-1270.9202,-1276.1729,-1268.2603,-1273.1329,-1270.9202,-1273.0883
-1270.6295,-1275.3458,-1270.8307,-1276.1952,-1268.1709,-1273.0659,-1271.0095,-1273.1329
-1270.6072,-1275.3458,-1270.8083,-1276.1952,-1268.2603,-1272.9989,-1271.0767,-1273.0883
-1270.5178,-1275.4128,-1270.719,-1276.1729,-1268.2156,-1273.0436,-1270.9648,-1272.9766
-1270.5178,-1275.301,-1270.6743,-1276.1057,-1268.1486,-1273.0212,-1270.8307,-1272.9541
-1270.6072,-1275.2563,-1270.7413,-1276.1057,-1268.2156,-1272.9989,-1270.8531,-1273.0659
-1270.6072,-1275.3235,-1270.8083,-1276.1057,-1268.1932,-1273.1776,-1270.8755,-1273.0883
-1270.5178,-1275.3235,-1270.6967,-1276.2175,-1268.2156,-1273.1106,-1270.9425,-1273.0659
-1270.6072,-1275.301,-1270.6743,-1276.1729,-1268.3274,-1273.1106,-1271.0767,-1273.0883
-1270.5178,-1275.234,-1270.8307,-1276.061,-1268.2826,-1273.1329,-1271.0095,-1273.0883
-1270.5402,-1275.301,-1270.7413,-1276.1057,-1268.3497,-1273.0436,-1271.0095,-1273.0883
-1270.6072,-1275.301,-1270.6072,-1276.0834,-1268.2156,-1273.0883,-1271.0767,-1273.0659
-1270.4731,-1275.301,-1270.7413,-1276.0834,-1268.1709,-1273.0212,-1270.8531,-1273.0659