CG1 form with gain + loss - 4 weeks rule

I'm trying to fill my CG1 form and I'm confused with the 4 weeks rule.

I bought some shares at a price of 22 USD per share last September then I sold them for a share price of 14.9 USD in November, then I re-bought those shares for 15 USD again in same day in November.

Can I use this loss to offset other gains I made?

And one more question please, what if I sold these shares in the future for say 20 USD per share, technically I will be still making a loss so how to calculate CGT for this transaction?

In in the revenue website, it says that Shares bought and sold within a four-week period cannot be offset against other gains. However, as per my understanding I bought the share then I kept it for 4 weeks then I sold it hence I could offset this loss against other gains.

Appreciate your explanation as it's confusing

Thanks!