Account share balance significantly less than total of "Available to Sell" when specifying lots

Question

I'm attempting to reconcile lots held in Quicken with the lot details recorded by my brokerage for a frequently-traded security. I noticed this morning that one of the issues appears to be that -- although both my brokerage and Quicken show that I hold 770 shares of this security -- when I go to sell shares and specify lots, the "Specify Lots Sold in This Transaction" dialog box shows a total of 836 shares under "Available to Sell". How is this possible? I've done a Validate and Repair with "Rebuild investing lots" checked -- no change. I'm running Quicken Premier Version R45.13, Build 27.1.45.13.

q_lurker · Answer

I suspect (in Quicken) you have a long position of 836 shares and a short position of 66 shares such that Quicken shows your net holding as the 770 shares. 
I’d be looking for a 66 share sell that does not properly indicate what shares are sold. It might or might not be recorded as a ShtSell. 
If you find the transaction, it will likely be best to delete and re-enter it.