So, as stated, I have issues with some artificial geometry... Every time I fix my geometry, close hammer for the day and re-open it in the morning, I'm having this issue. The geometry moves on it's own. Is there some sort of work around for this? I'm not just running into this with that arch, but everywhere in my map, I'm kind of really pissed off by this. I've never had this issue before mapping for HL2 so I'm clueless as to why this is happening now and only with CS:S mapping.