I just thought I might get some input on this in case it develops the way it's looking like it will (I hope it won't, but I want to know the best approach to take if it does) - if anyone has had experience with a similar situation, advice etc very welcome.
I've been buying from a supplier well over a year, no problems (not any worth noting, anyway). They have two sites which I use, one is for smaller wholesale quantities, the other for much higher wholesale quantities - for the sake of ease. I'll refer to the smaller one as site 1, and the bigger one as site 2. In December, I made orders on both sites a couple of weeks apart - site 2 has a longer lead time, but they told me my order would ship out on the 19th of December. It did not, but before the 19th, I ran out of an item unexpectedly and made a second order on site 2, so I then had two open orders there.
Later in December, they shipped my site 1 order via DHL, and I received that no problems on the 29th. I sent an inquiry asking about my site 2 order that they said would ship on the 19th and their response was "we think you've already received it, hope you like it" 😞
I replied and said no, I have not received it, according to the order details it hasn't been sent, and mentioned the only order I had received from them is my site 1 order.
They replied with "sorry to mislead you, we can see you have 2 open orders on this site now - we'll send the first one tomorrow, and the other one the day after".
Now, I've received a shipping notification for the first of the site 2 orders, only they've used the DHL tracking number that was for the site 1 order. (Shipping method I selected for this order was in fact USPS).
If I need to dispute the site 2 order, they will have tracking information to show they sent me something that's definitely been received, so I know I will need to talk to PayPal and discuss options and make sure I can show that if they supply information from another order, PayPal will actually believe me. 
Has anyone experienced similar, and if so, how did you approach the dispute or PayPal?
