2 small questions

I've just started farming level one forts in my fairly new server and i noticed that i no longer receive prestige for many of my battles. I think i vaguely remember reading about a attack limit somewhere so i'm assuming that you can't gain unlimited prestige by farming the same clump of forts all day long? What is the limit that i'm running into here?

Also i currently have a branch city stuck smack dab in the middle of at least 6 level 1 forts within 6 min of me. It's a pretty sweet setup since no one else is anywhere around but i'm concerned that the forts may level up just like the oasis do and leave me high and dry. I haven't seen this happen yet but was just wondering if forts keep their original levels or do they change like oasis do?
Thanks again guys!

I'm not entirely sure if they lv or not and I've not been getting much prestige either, I think you may need more troops. Also lvling up the healing attribute greatly affects the prestige you get depending on how many people you heal.

Right now i'm level 8 and am using 300 cats and 1k swords to take level 8 oasis and lvl 1 forts w/out losing troops.

Forts never change level. I don't really know about the first question though, I assume you're right and there is some form of limit.

There are four ways to gain prestige.

1) building troops
2)upgrading buildings and resource fields
3) killing other players troops
4) getting a bonus from upgrading your general level

You will never get prestige from killing npc troops in an oasis or a fort.

Also, as was mentioned, a forts level will never, ever change.

your biggest concerns with the forts leveling up, is that they wont, so when you are a higher level, and you could use the resources from the higher lvl forts. you will wish that not all your forts were lvl 1. eventually.

If you had ever gotten prestige from forts it was a glitch.
You cannot gain prestige from killing enemy troops of forts/oasis.

the only other way that you could get pres from a fort is if you killed troops in an enemy occupied fort.