Incorrect Price Showing On Category Page

Store Builder in detail Issues & Troubleshooting
#1

It's just been noticed that prices are wrong on the catergory page, for example see the following link and look for 'Rhododendron Gomer Waterer' the price is showing as £21.99 but when you click on the product it is only £14.99, seems to be a problem only when an item is out of stock, if i add one back in stock the price on the category changes. There is only one option for this plant so I have no idea where £21.99 is coming from, any ideas?

http://www.jacksonsnurseries.co.uk/plants/plant-type/rhododendrons/#ty%3Bpagination_contents%3B%2Fplants%2Fplant-type%2Frhododendrons%2Fpage-2%2F

#2

I see 14.99 everywhere. Fixed?

#3

Not fixed yet but its stumped me.

http://prntscr.com/e9nhve

#4

Yes NOT fixed, but we have added that item back into stock now but if i take it out it still goes back to £21.99