Apologies for the confusion with the post numbers stated; it looks like some posts were deleted, so the post numbers referenced became incorrect. I have replaced the numbers with the relevant links, as it is just the display that is wrong.
Your post was not one of the ones that I linked, which should be evident if you click on the link for 145 in your post above. I've changed the link references to normal links in my original post, for clarity's sake, but have not done so where you have quoted me so that you can see where the links actually point.
Once again I'm sorry for the confusion, but sometimes you only realise something doesn't work properly in hindsight.
Regarding your question, I have collated some of the questions and replies on the 7 day cool down period that is being discussed in the following thread:
7 Day Guild Cool Down
I'm not sure that I have an answer at this moment on the issue of why sister guilds can share a forum whilst there are now some restrictions on rejoining guilds, but the above thread might go some way to explaining some of the things that can and cannot be done since the update, especially the post regarding
alliances.