You don't sound like a thicky at all. It's quite technical, but could be important going forward. I'll try and explain it as simply as I can, but it's not straightforward.
When a company issues shares, they have what's called a nominal value - the face value of the share. In the case of Sunderland Ltd, this is 1p; for SAFC Ltd, it's £1. However, shares are normally sold for more than that when they're issued. That brings in more money than the nominal value of the shares - the difference is put into something called a share premium account, which forms part of the company's reserves. The other main part of a company's reserves are retained earnings, the accumulated profits over they years (or, in Sunderland's case losses). In the case of Sunderland, these reserves had grown piecemeal over the years, to the point where the club had a huge share premium, and equally huge losses.
The reason this is important is that a company can only pay dividends from what are known as distributable reserves, usually meaning retained earnings. Other reserves, including the share premium account, are called non-distributable and can't be used to repay shareholders. In Sunderland's case, the retained losses were so large that there was no prospect of the club having distributable reserves for the foreseeable future. It also makes that side of the balance sheet look really untidy, and gives a misleading view of its solvency if users only look at the retained earnings number
If a company is clearly solvent (and the directors have to submit a signed declaration to that effect), it can, with the agreement of 75% or more of the shareholders, either reduce its issued share capital, cancel its share premium account, or both. This has the impact of increasing the distributable reserves and making the balance sheet look much neater. It also opens up the possibility of dividends being paid in future.
Why is this important? Well, one potential initial investment method for FPP would be to take up what are known as preference shares. These usually have no voting rights, but are compensated for lack of control by a guaranteed dividend (usually x% of nominal value), which has to be paid before any dividends to ordinary shareholders (that's why they're called preference shares). This is the way MSD invested in the Florida Marlins. Obviously, to pay a preference dividend requires distributable reserves. Now. I'm certainly not saying that this is the intention. However, it does make it a possibility. Quite often, preference shares also come with a right to conversion into ordinary shares - this could provide FPP with a means of taking control gradually if they went down that route.