Yes, the glitch I was referring to was when it initially asked for payment against my own seat selection. I fully expected the fee on my wifes booking. On my own booking, it also priced in USD for all seats the first time round. On the second time it priced GBP for the exit seats. It looks like the app did not correctly look at my account the first time - I was fully logged in both times. This must be the app equivalent of HUACA.