This Everytime I want to put an item in my post like this the whole post gets skewed so annoyingly with the item on a whole new line.

I think it has something to do with the new wishlist feature / hover. I don't think there's anything you can do about it right now.

How annoying. Not everyone's posts are doing it though, maybe it's just a glitch for now then

Where are you seeing posts that aren't doing it?

It's been happening since the new forums were implemented. I'm not sure if it's something they can/they're planning to fix, it might be worth adding to the thread of issues in Problems and Bugs if it's not there yet.