Have you incorporated the applicable jscript_framework.js file(s) into your template?
The only issue I really came across with DPU on ZC 1.5.6/a was that I hadn't coded enough into the determination of when to show 'starting at:', versus 'at least:' versus 'your price:'... i locally incorporated more of that but was testing this last weekend to be sure before distribution/posting.
I haven't tried on ZC 1.5.6 NOT using the jscript_framework method (where the script variable of zcJS becomes available), so there could possibly be an issue that needs to be addressed with the XML method...
The code that contains/generates that result is yes found in the includes/modules/pages/YOUR_PAGE/jscript_dynamic_price_updater.php file. Be interested to see what needs to be adjusted. What browser was being used as well?
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