Paytm digital gold discrepancy

I just now made a paytm digital gold purchase. They say buy and sell at live market price anytime. I bought 10000 rupee gold, they say it's live price includes 3% gst. So, live price was around 11747rs/gm, which got me a gold of 0.8269gm. Plus they had an offer, which got me a discount of 500. So I paid 9500. Just after the purchase, it shows the below data where it says my gold value is 9713 rupee, don't know what other two numbers meaning here, invested and returns. Now I tried to sell it, it shows me strange new nunbers it says I will get 9158 rupees because they have a live sell price which is 11075rs/gm. Where does this new sell price come from, there should be only one market price. So, I am loosing my around 400 rupees just next moment I bought it, that too when they say I got 500 rupees discount when I bought it. Can someone explain, or they are fooling?