Same Batch of Resin Cured Differently

Hi- this is my 1st post so I hope I don’t mess anything up. I used a 2 part epoxy called Amazing Clear Cast (is it ok to ask about a brand other than Resin Obsession? I saw some ?s where others did so I really hope it’s ok). Anyway, I’ve never ever had any issues w/ that kind before but the other day I mixed a batch (it was possibly 40 or 60mls, I think 40) & I measured both the resin & hardener out perfectly. I then mixed for close to 6 minutes as I always do to be safe. I filled 3 bookmark molds & w/ the same batch I filled 2 different bangle molds that had shell fragments inside. I’ve made several shell/resin bangles before & they were all fine prior to this. 2 of the bookmarks cured perfectly & the other is completely fine except that it’s a bit flexible, so I’m wondering if that could be from how thin I left it. One of my bangle molds is a bit thicker than the other. The resin in the thinner mold is almost good but very very slightly tacky & I can’t seem to get it out of the mold. Then the thicker bangle feels just a bit more tacky than the other & isn’t budging from that mold at all. I’m SO disappointed that I prob ruined my only bangle molds. I’m 1st wondering if anyone would know why/how some things cured perfectly while others, from the exact same batch, remain slightly tacky? Oh & my room was quite hot that night, and that’s where i store, mix & create w/ resin, in case that matters. I’m also wondering if, since the bangles are only a LITTLE tacky & not a sticky goopy mess, are there ANY tricks or advice you guys can offer so that i may get those bracelets out of the molds so they’re not completely ruined? Last thing- i do pop the bubbles w/ a tiny little butane torch. I do it very quickly & went over everything every 10 minutes w/ the torch for about the 1st 40 minutes after finishing. So even though I torched them as little as possible, & even though I do that w/ all my resin pieces that have turned out fine for years now, I can’t help but to wonder if maybe that had something to do w/ it? I’m sorry for the long post, it’s probably excessive. I’d just really love some help so that I can avoid this in the future & I’m really hoping I can get those 2 bracelets out of the bangle molds! Thank you so much. -Jasmine