Got some Minor but annoying Blender issues

So I have two problems I ran into today, and I hope someone can help me solved them.
The first one is when I use auto merge it jumps to to a different location (see image) and the second one is related to UV unwrapping. For some reason one of the edges is separated in the UV and I can’t figure out why it happened.
It’s not major problems and I have worked around them. I would just like to figure out why it happend, to avoid it in the future.

I guess you applied a bevel modier? And adding additional edges to the geo there are also for the UVs… then while