Thanks Red_Star 
One thing that I forgot to mention was that apparently, one of the screws that I used to mount the motherboard is stuck in the case, because that type of screw was not compatible with the case mounting panel holes. They showed it to me and it is occupying the very top left hole. They said something about how they couldn't get it out but they could still mount a motherboard inside, it just won't be screwed in to where the stuck screw is at. Will this not affect my motherboard in a bad way? After throwing a lot of money into this thing (including repair work and professional rebuilding), I don't want to deal with any more issues :/
One thing that I forgot to mention was that apparently, one of the screws that I used to mount the motherboard is stuck in the case, because that type of screw was not compatible with the case mounting panel holes. They showed it to me and it is occupying the very top left hole. They said something about how they couldn't get it out but they could still mount a motherboard inside, it just won't be screwed in to where the stuck screw is at. Will this not affect my motherboard in a bad way? After throwing a lot of money into this thing (including repair work and professional rebuilding), I don't want to deal with any more issues :/