Personally, whoever is the person who started that fire, I think it was changed. Because when this story first began, the show had no idea that Ciara/Ben would be such a hit with so many viewers. And the admiration kept growing. I don't think they intended Ben to be the culprit.....maybe accidental, who knows.
Would not be the first time the show had to rewrite and change. (i.e. when Patch abruptly was "gone". When Drake Hogestyn (John) was so badly injured, in the midst of big story, when Christopher Sean (Paul) decided to leave Days, tho he gave plenty of notice, and same for Marci Miller (ex-Abby). And the biggest rewrite and storyline direction change, when Reilly killed off all those major characters, and then was ordered to bring them back, did not care how, just get them all back and alive. LOL
This is why there was nothing said for so long about that first fire. Hope just continually insisting Ben did it, despite being proved that was not the case, she just assumed everyone else was wrong, lying, recalling incorrectly, etc. Only she was right.
So......in that pic, Claire seems to either be in a daze, or staring at someone......maybe that pic is a red herring. The spoiler says we learn WHO SET the fire, and why.
So, it was deliberately started.......and if they word a spoiler like that, seems odd they would show a pic giving at least part of the answer.