hi ford, you have got more levels than me so far :)
we can check the calculations too, but could you also try mousing-over (and clicking) on the little blue storage symbols that are near the top right of the window (just to the lower-right of each main resource)?
eg SPgold, energy, workforce and equipment.
when you click on it, it will bring up an upgrade popup (but will hide all others and just show you storage-related add-ons)
(if it shows you a page number when it returns the list, please click on it in case the window needed a refresh)
does that help at all?