Need help regarding an issue on Rakuten Securities

Hi everyone I bought 2 unit gold etf from Rakuten Securities using market order, but I mistakenly selected the left hand side highlighted option instead of Nisa.

Moreover I set two market order one at the price of 98 and another at 97.5. But I can see that the average price of my purchase is 98.25. I have attached ss as well.

Also it shows a weird option at the bottom left which says stock lending. I dont know what it means and what happens if I sell it. Please help me understand the scenario.

by Curious_Learner_R