Product pricing weirdness

[CenturionSigns]

Hi folks,

My products all have children, I have set up the categories page so that the lowest product price shows.  This works fine, and is still working.

However, when I click on a product details page, every single product on the site shows up as £12.38 

When I select a child product, the price auto updates as it should but only for a split second before returning to 12.38

Bizarre!   Anyone have any clues as to where I should start investigating this weirdness?

  I did have issues with pricing doing this but with a 0 value, however we discovered that checking the Disabled radio button in the Pricing Override section fixed this.... for 24 hrs and now it's doing this!

Virtuemart: 2.0.12f
Joomla: 2.5.8