I've gotten a price adjustment for petty things like this. When I'm shopping, I am a guest like everyone else. Yes, I do read my signs (I always have even before retail because I never wanted to look stupid- oye, anxiety). I've even helped other TM's who have had similar problems. It happens. But we aren't allowed to be pricing the red sale signs if they are expired, set in the wrong place, etc. Like someone mentioned, we are expected to know how to read the expirations, so as a TM we could be taking advantage of a mistake. I tried explaining this to a TM once who... just... she knew it was expired and was angry that I was warning her even after we took down the signs. 'Why can't I get that deal if 'this guest' just got it?!'
'Because you KNOW it's an expired sale and are using it to your advantage for a price adjustment. They (the company) has ways of monitoring stuff, you need to be careful.'
'Well, that's not fair.'
'It is because you had all last week to take advantage of the sale then. Let's okay this with the LOD first so we don't get you in trouble.'
Our LOD finally let her have it but also gave her the same talk. After all, it was winter and we just had a cold front come through, it was an electric blanket, and she didn't have heat in the little place she was staying. I just really didn't want her to get termed over something so trivial. Anywho.
There's also other ways a TM could take advantage of knowing signage and mis-pricing, but I won't list them here. It's just a big no no.
Price matching can be done up to 14 days with receipt. Even team members can do it. I'd suggest reading the price match policy on Target.com so you can arm yourself for getting the best deals with best practices in mind.