I have a question regarding some differences between the LN and the manga

So, I started reading the manga cuz I got bored waiting for the next season of the anime, and then after I read all the translated chapters I started reading the LN and I noticed some massive differences, like for example, in the manga, Hinata knew pretty early on that the her god was in fact a demon lord, but in the light novel, noone knew, not even hinata, untill hinata was 'killed' by Chloe and then resurrected, another is that in the anime as well as the Manga the 7 sages got killed right away after their plot to kill hinata, but in the LN they are still around, another inconsistency is when in the manga rimuru has joined the council of the west (I think that's what it's called), hinata is all fine, and is still the capitan of the holy knights, where as in the light novel, by that point hinata died, was revived and didn't have that power, also in the LN she already was awakaned, Yuki had fled and already to the empire, and the war with the empire was already brewing, whereas in the manga Chloe is still dormant, also Yuki being the bad guy was detected by rimuru much faster in the LN than in the Manga. Another thing I noticed, is that at this point (I am at the point of the angel invasion in the LN) I heard no mention of Mirabelle, whereas in the manga she was clearly shown a few times already but he time the council gathering took place. I am confused with this so could you help me out? I was trying to find the answers on the internet but couldn't, it could be something that I missed, or I'm reading the wrong thing somehow??? Tho that seems unlikely due to many other things lining up, or maybe it's just chapters that I accidentally skipped but it's bugging me that there are some timeline and lore inconsistencies. So please, if someone can help and explain to me those inconsistencies, if there even is an explanation.

(Also admins forgive me if I tagged it wrong, I didn't know which tag to apply)

Edit: thank you all for the replies, I already received the answers I wanted. Again thank you all for help