Hi @Chris_Lrnt,
Just to reiterate @Simon_MyLeads point - you’re not doing anything wrong. The Deals tab is where you view your deals and their value. The percentages you’re looking at affect reporting on deals, rather than the raw data.
You’ll see this information on reporting dashboards. For example, the default dashboard will include a Deal Forecast report which shows deal value * % probability of success. There are various reports which will show this, listed here. For example:
"Deal Revenue per Stage by Deal Type: the total forecasted amounts for deals in each stage, broken down by deal type. The total forecasted amounts are calculated by multiplying the deal amount by the deal stage probability. "
Enjoy!