Can they? I don't understand technicalities but can IG itself change anything or the forum host must?
Obviously, they could change host.. But that's money related so we have little say.. XD Can it be fixed by IG somehow though?
I'm not an expert like some of the other guys here but I created a fair share of web pages and was a system admin for some. You are responsible for your own pages - you can do with them whatever you want (as long as it's nothing illegal) - and I'm talking as a private person, not a company because I'm sure that some companies - especially digital stores - must use their own servers because of the amount of data they're dealing with.
The link soooomewhat helps..
Say you add 4 choices.. The other one can pick just 1 or all 4? (1 for 4)?
Can you counter?
What if you need more than 4 options?
Auctions are the same? Or those are only for keys bought from the store?
On another note I'm having difficulty to understand the logic behind multiple HH bundles.. Shouldn't this be 9.98 for x2 HH instead of 19.56? Or I'm missing something?
OK - about bundles - I don't have a clue how they decide prices.
About trading - for starters, you only have 3 choices because, although IG lists 4, they'll show just 3. Yeah, another IG bug. But you can ignore that - those 3 games you put there are just a showcase, your wishful thinking that someone will offer you those games.

1. Name of your trade - I mostly just write the name of the game.
2. Now, this is the most important thing - here you can explain what kind of games you are interested in. Because your IG account is connected to your Steam account, they can click on it and check your Steam wishlist (if your Steam account isn't locked)
3. That is only for the games/bundles you bought on IG. It's similar to giveaways where IG-bought games don't need feedback because they're guaranteed.
4. That's what most of us are using. You need to find a Steam page of the game you want to list for trading - enter that link and press Enter, then add the game key in the new field and confirm everything by clicking on Select.
5. Showcase we talked about. Pick one to three games you would love to trade for - it doesn't matter. I doubt anyone will offer them anyway.

6. For how long do you want your game to be listed for a trade.
And that's all.
And yes, auctions are just for a key bought in the IG store.