I sometimes have issues with my "sight" but only occassionaly with this "site".if I take too much time to write a reply I usually have to log in a second time, just always figured that is the way it is.
Old man- (on a serious note) if my messages take too long to write, it will automatically kick me off. If I'm on a rant and it takes me forever to write my post/reply, I make sure I copy it before sending. That way, if it kicks me off, I have all my text saved. Then I simply log back in and paste it. There's probably something else wrong that I'm doing though.
I run into problems if the pic I'm trying to post is too big. If I think a post will take too long to write, I type it in word then paste it here. Keep plugging away and if you run in to more problems PM me and I'll try to help.
Type it in the post...CTRL+C to copy it to the clipboard...and keep typing, repeat as necessary depending on how long your post is..before you hit the final button to post it, CTRL+A to select all, then CTRL+C to copy...so you have it all on the clipboard in case you need to paste it back in if it fails...CTRL+V to paste it back in if you have to redo the post.