Do not worry, this does not mean that you are not correctly practising meditation.
You have not transformed your home into a spiritual home or ashram.
At home, you live with more emotions and more reactions while here in ashram, to some extend, you are free from emotions and reactions. The atmosphere changes in places where many people meditate on regular basis and this is why you find it easier to meditate more deeply in the ashram.
Extracted from The lineage of Kriya Yoga Masters – Paramhansa Prajnanananda, Pages 144 – 145