return order & ceased trading

I ordered a pair of Merrels on Jul 5th, package that was delivered home in Belgium on Jul 7th was not the type of Merrell I ordered. Wrote immediately an email to report the wrong delivery and they asked to return the package and they would send the correct one, once goods returned. My return was back in the UK by the 19th and by then my requested type and size were no longer in stock as they did not reserve this at the moment I advised them about the error :-( (bad company sevice I would say!). But the same day I got a full refund via PayPall on the costs. The same evening, I checked the website again, and my type and size were in stock??? So I immidiately ordered this item again and within minutes the Pay Pall order was confirmed by email from Fitness Footwear and Pay Pall. And the price was even cheaper than the first order. Withn 15 minutes, I checked the website again to order maybe another pair of Merrels (my favorite branch by far) and found out that my just ordered type and size were again sold out and the 'ceased trading' banner was on the website!!! I was confused how all this could happen within 15min. Even more the next daybecause the dispatching of my order was confirmed by email but on the tracking page of my order the goods were (and are) still not yet shipped??? As we had national holiday last week and post service was not running as it should I was wondering for this outcome. Untill yesterday the correct pair and size were finally delivered. Now the company ceased trading but they have still loads of shoes on offer at great prices and also have still a confusing banner saying that warehouse clearance is still on???
I got my goods in the end (just in time I guess before the ceasing) but do not trust it anymore to continue with it for the superdeals of the warehouse!