I was seriously thinking of BRU-OTP as positioning on BA, and I found what to me is a weirdness.
For July all results are displayed like it was a multicity booking, no way to see which flight combination is cheaper or to see ET and CE priced side by side and maybe mix them. However If I do the same search a month before, in June, the results are displaying as usual, even if with another weirdess about CE; in the chosen date is shown unavailable, but if you change the day and then go back to the first, CE is again selectable.
When you try moving week by week into July, the last week of june shows a lot of no service dates, an then when you click an available date in July, the results come back as multicity display style.
What's the problem? A glitch or something else?