Merging portfolios in either builder or retester end up showing equity curves/trades the same as one of the strategies being merged. The number of trades and stats appear to merge but visually can't see the new equity curve changes because it appears to always just pull from one of the equity curves of a strategy in the portfolio.
Merging portfolios in either builder or retester end up showing equity curves/stats as one of the strategies being merged instead of combining graphs/stats. (I thought in the original post that it was just the graphs but it seems like just some of the stats merge... not all and again the equity curve graphs are just mirrored from one of the multiple strategies in the portfolio)