1. The future is not fixed. Until you experience it, the future remains as an array of possibilities with a "most likely" scenario based on what holds the greatest energy.
2. Viewing the future can change the outcome. Even a 100% accurate view of the most likely scenario will trigger questions about whether you want that scenario to manifest, and that change can influence the outcome. This can give the illusion of inaccuracy in the original prediction.
3. Inner impressions come into your awareness through your imagination. However, a fertile imagination can create images on its own, almost for pure entertainment. True impressions of a future event arrive while you are in a meditative state, or sometimes while performing a monotonous task such as driving at a constant speed. They don't fire up with the great energy of a dramatic imagination. They slip in quietly and have to be examined and unravelled to see what each impression contains.
4. When you first start scanning the future, your predictions will be less accurate than they will become later, after constant practice.