I'm not sure they are random looking at your list. Instead I'd draw the conclusion that they are numerically ascending based on date they were draughted. I'm not suggesting they are public/retail release date related (although the ESB are higher than SW numbers, so they are in that sense), but take them in a broader context of all paperwork that Palitoy is designing/draughting across all lines they are producing and its therefore more than possible they are actually in a very sensible order.
I base my idea on how we work in retail supply chain and in our buying and product development team. We assign SKU (stock keeping unit) numbers (we use a different format, but still numerical) at the earliest point in the process, long before a product even exists, often before we even sample it. This way we have a range structure and record potential margins, supplier details etc. There are dozens, maybe even hundreds created that are never used (they sit on the database, but never become a product), so leaving gaps and some lines are released for sale with huge timing inconsistency compared to the numbers around them; though this is unusual.
Further to timing issues numbers will often fall out of sequence (to a public eye), we are also developing around six different collections at the same time, setting up batches or odd SKU in each collection as the process evolves. So, It's plausible that Star Wars and Action Man and Action Force and a Palitoy board game (Coggle or the like) were all in development at the same time across the multiple teams at Palitoy and they could all logging SKU numbers for their products or paperwork as they go.
So to my eye, you have an order that doesn't look like an order without seeing all the ranges and never produced products in one wide view.