I wonder if anyone else have to login each time visits or when certain amount of time passed

Yes you will have to log into the site every time that you visit.
We have set the login to expire 15 minutes if you are not active on the site, this is done fore several reasons, security is the main one, bandwidth is the next.

We are constantly looking at upgrades and features, we can look into this for the long term, but for now it is not on our radar as the cost of development would be an issue.

Ah I was going to ask about this too! So 15 minutes...! I was writing a post here on forums and multitasking, wrote quiet a lot and then after submitting it was all gone and had to re-write lol... Not a big deal, I'll just have to remember to copy text just in case.