Understanding Society User Support

Hi,

Are there boost samples for ethnic in Innovation panel? Since I cannot find the information about it, thank you.
Besides, I've checked a_psnenip_xd (cross-sectional person design weight), the value ranged from 1 to 4. However, the frequency table on the website is only 1, I would like to know what make them different, thank you. And since the Innovation Panel sample is a equal probability design, why there are different design weights for individuals. Thank you.

https://www.understandingsociety.ac.uk/documentation/innovation-panel/dataset-documentation/wave/1/datafile/a_indresp_ip/variable/a_psnenip_xd