Priority Visa for settlement or migration service UK

Hi All

getting real confused

trying to do a visa application for the mrs to uk using the VFS Priority Visa for settlement or migration service.

information does not match waht there website will allow me to do though.
i'm in the UK with all the documents .. gathered them all here as it says we have to post them sheffield UK
but now it says we have to upload them all ... and also take them to the VFS appointment,

last year did a application for my sons wife ... we sent her to VFS just with the application form .. and posted all supporting papers to sheffield and all was well.

concerned now as the originals and the huge pile of papers cannot be in 2 places at once.
can anyone please please advise waht is correct ... post to sheffield UK or take to VFS BKK. ..

also it won't allow me to get past screens on the website to book and pay for the Priority Visa for settlement or migration service (30day) if the documents are not uploaded