When users are trying to search features that are not yet completed, they usually place in the filter "percent done by story != 100" and always the results are not accurate?
This issue happens when a Rally user tries to filter the conditions without checking the field types in Workspace or Projects.
Release : ACSAAS
In order to fetch the correct results in the "portfolio timeline" please set values in Decimal.
For 100% "percent done by the story =1"
for 50% "Percent done by the story =0.5"
Percent Done By Story Count field is a Decimal Type in Rally.