Odd results, products in same category

[Paulito]

Good Morning,

 

I have just started to play with adding products to ps 1.5.0.17 to see how things looked etc and have come across this: (see attached)

 

I am using ps 1.4 for my other sites but have never had this problem before, it almost seems as if a line of code has not been completed correctly.

 

Your help, as always, is appreciated

 

Paul