What should I do if the amount on my T4 for RPP deductions is different than what is showing on my summary?

[TurboTaxLise]

Go double check your entry on T4 box 20, which is transferred to line 207.

[blit]

I have a similar issue. The amount on Line 20 of my T4 slip appears to be doubled and then entered in my RPP/RRSP/PRPP and split-pension field in the Credits and deductions section of my tax summary.

Any thoughts on why this would happen?