Signal polarity (sign) in Cyton data

Hello,

I am currently confused about the polarity (sign) of the EEG signals from the Cyton board.

In the following forum post, it is mentioned that the signal polarity from Cyton is inverted:
https://openbci.com/forum/index.php?p=/discussion/comment/16393#Comment_16393

However, when I compare signals from:

• OpenBCI GUI
• my own Python application using pyOpenBCI
• my own Python application using BrainFlow (Python)
  the polarity appears to be consistent across all of them.

In the OpenBCI GUI, both positive and negative values are clearly displayed on the graph, and they match what I observe in my own applications.

So my question is:
Is the Cyton signal actually inverted at the hardware level, and the GUI compensates for it?
Or is the GUI simply displaying the raw signed values from the board as-is?

For reference, my electrode setup follows the official EEG setup documentation:
https://docs.openbci.com/GettingStarted/Biosensing-Setups/EEGSetup/

(Reference electrode connected to SRB2, BIAS connected as recommended.)

I would appreciate clarification on how polarity is handled internally.

Thank you in advance.