Ahh, I see what you are saying. The issue is in the way search operates differently in MC than Gizmo.
In MC, search only searches within the current View, and it bring up relevant results displayed within that View scheme. Files outside your View are excluded from the results.
In Gizmo, you search your entire Library outside of a View. It cannot create a View on the fly or guess which View scheme you would like the results displayed in. Therefore, it just displays the results in a drop down and only allows you to Play or Add. That means for an Album result, you can not drill down into the Album.
My response above applies within a View where you drill down into an Album. In the search results, it is still the same except when the result is an Album, it applies to the whole Album. Play clears the queue and plays the whole Album. Add adds the whole Album within the queue.
I am assuming that results are capped in order to optimize speed and limit the drop down since you are searching the whole Library, and results can only be displayed in a drop down. Basically, you just need to be more specific with search requests. If you searched by Album name, one at a time, all 21 Albums will show up (they are all there); they just won't show up all at once when you search by Artist. Likewise with the individual 244 Tracks.
If you have an Artist View set up, and go into Clifford Brown, you will see all 21 Albums at once, and you will be able to drill down in each Album to the individual Tracks and play them one at a time as I described above.
The only solution I can see would be adding Search to the Commands list within a View so that search worked the same as it does in MC.