Packed 4-bit weights are often identified as u8 byte arrays in the safetensors metadata, so the HF UI counts them as half a weight each.
I would think there is sufficient information in the various config files to work this out, based what I've seen in my own quant artifacts.
Yeah, I agree it's probably fixable, but I think a naive interpretation of the metadata is probably the source of this bug (which HF has had for as long as I can remember)
I believe it's because this model is natively fp8 (for the most part), and that display struggles native quants.
I noticed the same, and I wonder as well.
I suspect they are calculating something in the weights or config, I see it pretty consistently with quants