Hey there,
Probably is my lack of proper english skills (I learnt with movies and cereal boxes), so I'll try to explain myself better:
2: Yes, I'm using Woratana's (uber) fogs. But the fogs are not the actual problem, they were just an example. What I meant is that when I enter a map that previously worked in a way because I created an event that made it work in such way and then I delete such event and try again to test it, the map still behaves as the event calling whatever it was still exists, then I feel a bit uneasy and start thinking of conspiracies... such as there is something wrong with the maker (or my pc for that matter).
3. Yes I understand that passability most common problem is what-is-that-star-thing!? in the editor, I should know, I had problems with it for like six months or something,.the problem is that I'm walking on a specific tile and all of the sudden I can't go through it anymore, there was no tile change, and I can go back of course, but there is an invisible wall that won't let me go further. I did check for events that may have been blocking my path but none was to be found..
4. I also understand this, I'm a graphic designer which means I save in a compulsive unhealthy way, I also make back ups every hour (no kidding) for the data and graphcis folder, which indeed means I have several folders with the game in it, however I also only open from the folder that my game is exactly in order to avoid this. And no, I didn't close it anyway from creating to testing.
5. I downloaded my amazing Ace copy from the official page last year. (Edit: And only having these problems now by the way, forgot to mention).
Ok, to wrap things up: After saving the project, I always choose New Game to test whatever I'm doing (I see this being a common problem around for which I wanted to mention it) so if it's not an event on the current map or a script calling it 100% of the time, it should not happen and sometimes it still happens (like with the fogs and as you may know, woratana fogs have to be called with an event). I test locally (so to speak) which means I test map by map - region by region, etc. And always make sure of which tileset I',m using and double and triple check its passability properties when I find a problem (I find them al the time), there was none this time - Actually I fixed this one creating a new map and copy-pasting everything from one map to the other and magic! - and well, I just guess this time those hoofbeats are indeed zebras (or a ninja horse or Sleipnir, please let it be Slepinir).
Thanks for your answer!
Cheers!