Hey there.
I am an SDA Christian and sorry this was your experience. There is a shaking going on the in church many will leave, many will come in. Unfortunately, not everyone who claims to be SDA is SDA and I have experienced this firsthand. I came from Pastor Batchelor's church which was so biblical and when I moved to another state and was surprised how different the churches were. Sometimes I felt like I was in a Sunday church where emotion, music etc took precedence over sound doctrine. After a year of search, I am blessed to have found one that is centered on God's Word and such warm fellowship. Sadly a lot of progressive people have come into the church wanting to change it and we have to remember even Jesus had a Judas. Just curious if your desire to leave the SDA has led you not to believe in the 4th commandment, as there is other seventh day commandment keeping churches out there.
I would suggest you make a post in the Traditional Adventist forum on your questions about Paul.
Traditional Adventists
I know we would be happy to answer them as best we can. I personally believe what a lot of people do with Paul's writings is isolate them and never try to reconcile them to what Jesus taught and lived. Paul was a servant of Christ and never undermined His authority Mat 28:18, he had a way with speech that was difficult to understand even in his time and some people are comfortable having Paul contradict himself and Jesus, but I think if we dive deeper, we will see if actually harmonizes perfectly with Christ. I am happy to try to answer any of these questions, this forum is not the place for it, but if you want to post something here
Traditional Adventists I am sure a few of us would be happy to discuss.
Regarding 1844 if you have the time, here is a study that goes through this timeline and how it matches the bible perfectly. Its long 112 30 minute episodes with 2 pastors and 2 lay people going through each chapter of Revelation and Daniel and will take you through the timeline all by the bible.