It'll take a couple weeks for the hdrol effects to really take off. Meanwhile you will see the immediate effects from the 1-andro and the androgenic effects of the stano.
By the time you stop the 1-andro the h-drol will be in full force and your stano well maintain a positive balance on libido while solidifying your gains.
If you stopped the halo and continued stano for two weeks like originally planned, you might end up losing some size and strength due to diminishing glycogen stores. Pairing the two will help keep those gains.
Also you will experience less sides overall and be recovered sooner to start another run.