Capital Gains Tax Confusion

Hoping someone can help. I have the correct taxable capital gains under income line 12700, but the same amount is also showing up in line 25300 net capital losses from other years, under taxable income. 

Further when I checked my warnings it had one for net capital loss carry forward amounts, with 2 amounts pre-populated for 2018 and 2019 under eligible taxable capital gains, but negative amounts which the program forced me to change (number must be greater than 0), so I moved them to the net capital loss box. Note: these amounts do not tie to the amount in 25300.