The Shots claimed ten points from a possible 12 without letting in a goal and were confident of extending their great run at the EBB Stadium.
But the Shaymen had other ideas - their 1-0 win means Aldershot slip to sixth place in the National League table.
Waddock was puzzled as to why his team didn’t get out of second gear against a Halifax team struggling for form.
“We have done really well recently, but today we didn’t,” said the manager. “We were really disappointing.
“It was a really poor goal to concede and we didn’t work their goalkeeper anywhere near enough.
“Halifax has a game plan and credit to them for that. They stuck to that game plan and got their result.
“But we were nowhere near the standard or the level we were looking forward.”