I've been trying to price something in my shop and it keeps saying 'you have been directed here from the wrong place!' is there any reason why this is happening?

This is a glitch that happens from time to time. Not too sure if its browser related, or maybe your security settings. If you check the bug forum there should be several running threads about this. They may have some advice to offer.

Your firewall settings might be too high. Try lowering them or whitelisting Subeta.