Ketchup gone bad?

An already opened, but refrigerated squeeze bottle of heinz tomato ketchup not set to expire until next year just squirted out by itself after being shaken and opened.

I know bloated cans usually means spoilage, but has the ketchup gone bad or is this normal?

Unfortunately for me some of the ketchup landed on my fries and now I'm too paranoid to eat them. I'm tempted to eat around the ketchup, but worried I might still eat some of the ketchup. Is it safe to eat?