If you want to use the chapter number at the beginning of both chapter titles and table titles, you'll either have to use <$chapnum> (or one of the parallel building blocks such as <$sectionum>) or the same sequence in your chapter/section autonumbers and your table autonumbers.
You are currently using H: for chapters and T: for tables. H: works fine for chapters and sections. But your table numbers are not related to the chapter number and you want them to be. As you've noted, if you use T:<n>-<n+>, the first number never changes and the second one never restarts. And if you use T:<n+>-<n+>, both numbers change with every table.
You can get the behavior you want as I described yesterday by using the H: sequence for both sections and tables. Just make sure you have one building block (<n>, <n+>, or < >) for every counter whether for a section or a table) in every autonumber except the one for Chapter. Chapter autonumbers need only the first counter and will therefore result those for sections and tables.
--Lynne