Consumption of reward in crowdfunding after successful pledge not working

Dear Support,

I am experiencing an issue with the fundraising plugin setup for crowdfunding with several rewards added.

50 rewards are available to those who pledge £10. 1 pledge has been done (has a pledge ID and reward number against it) but the number of rewards remains at 50. Surely this should now be sitting at 49 rewards remaining?

I have SG CachePress loaded, would this interfer with the remainder calculation? I have cleared the cache but it doesn't make a difference.

The site is running TwentySixteen so no funny Theme vs Plugin clashes. I have tried it 3 different browsers but with the tally of "50" showing in each.

I have given support access in the background but you can replicate the issue in the foreground at - http://commandpostcentral.org.uk/crowdfund/fundraisers/were-crowdfunding-a-new-car-to-transport-veterans/.

Many thnaks,
Elliot