This morning I went to 'purchase postage label' and found that 3 single items (all marked as 26cm long, 17cm wide and 2cm deep, with a weight of between 101-250g in the postage section) came up as Medium Parcels with a cost of £4 something, whereas for the measurements/weights given they were Large Letter size at a cost of £1.65 each.

Even more strangely, a sale with 2 items in it (both in the above size band) also showed Medium Parcel at £4+ when I viewed all 4 transactions on the same page. I actually used stamps for the three single items, so only needed to purchase a postage label for the double item sale. When I just selected this sale it changed from Medium Parcel (£4+) to Large Letter at £1.65! In fact it was a Small Parcel @ £2.85!

I know this has been brought up before and the (unsatisfactory)'answer' was that any measurments in the title or IS were being picked up. I can only assume that because the three items had '606D' (series number), 1972 and 1968 (publishing dates) in the titles, it was assumed by some very badly coded bot that these were lengths.

Two questions:
1) What is the point of filling in the size/weight in the postage section if the dumb-bot is going to pluck randon figures from elsewhere?

2) (and I really would like an answer to this, not just a brush off that it has been passed on the relevant team)
Take the transaction with 2 items in it, where postage lable automatically came up as Med Parcel @£4+, then LL @ £1.65, when it was actually a Small Parcel at £2.85.
If that buyer opened a NAD case, where I had to pay for the return, what would I be charged at Small Parcel rate, or would I be charged for the Medium Parcel the dumb-bot thought it was first time round?