Problem in Some Calculating

Hi all
I am new to this market pls answer some my questions vwry very tnx

Why there is difference between sell and buy margin
For 100 share spy execution it gets
Margin (sell/buy) : 1026.91 / 1053.16
Sell margine is negative in 1 share

Second question

I bought 1 share of spy in 261.70 and it cost 1.5 dollar for me now i wanna sell in 263.06 thats mean
I made 1.36 point profit minus 1.5 dollar comission it should be 0.14 loss
But i got 0.29 dollar loss
Why did this happen?

Third question
Whats is that x130 in picture?
IMG_20190124_091414

Thank u alll