The estimated delivery dates on my listings are showing as 16-19th July ie 7-10 days. My dispatch time is 2 working days and are either RM 2nd Class or Packlink 2-3 days.

The eBay customer service agent I spoke to couldn't explain it and I have since been directed to a thread on these forums where other people have got the same issue. Can the seller fix this in their settings somehow or is it an eBay glitch that you need to resolve? It is impacting greatly on the sales of the sellers affected. 

Also as a side note the postage option of a medium parcel up to 5kg has completely disappeared. Along with letters being moved to 'other' as 1 generic option, is it these changes that are causing the estimated delivery date glitches on the listings?