RE: shares purchased at 18.13 on Friday15 May 2017 09:39
This is a regular and ongoing occurrance: late reporting of trades, especially when there is significant activity.
Sometimes it can be 24hrs late (there was one last week which I seem to recall was in excess of £200k...you can find them by scrolling back easily enough).
Apart from ones which appear between 5-6pm, it's also worth checking after 7.45am and before the open.