I live within 3 miles of an Ikea, know it inside and out and have just bought a kitchen from them and I would honestly say, you need to visit the store to get them to check over it.
They had to make a few corrections on mine, nothing to do with my plan just the number of legs allocated by the computer was slightly wrong, it gave me a plastic box thing to put under the sink cabinet which I didn't want (in case of a leak) and we double checked the amount of plinth, cover panels, etc.
For example depending on the hob I chose it dictated whether I would need to put cover panels on the bottom cabinets so that the wall cabinets still lined up otherwise they would have been 2.8cm out. You can't see that on the online planner.
This also is the 3rd kitchen I have planned and I am anal thorough in my research. Not Ikea ones though, from 2 other companies, this is my first Ikea kitchen.
It must be gutting when you live so far away but it is informative to speak to someone in the know.
Our delivery had a few items missing and a couple of slightly damaged things, we returned these with the delivery man and they arranged another delivery by telephone about 2 days later.
Plus if you buy in store you get a £100 voucher for every £1000 you spend so I got £300. I'll be using that once the kitchen is installed to buy interior fittings.
Hope that helps.