The same answers for different alternatives

#1
Hello
I compared the means of two independent groups by non-parametric test of Mann-Whitney in R. The same answers were concluded! The P-value is 0.3, 0.63, and 0.68 for less, greater, and two-sided alternatives respectively.
What is the reason?
Thanks for helping me in advance.
 
#7
I understood that my last answer was inappropriate. I thanked you seriously!
I did not know that all P-value s can be more than significance level! Maybe because my main expertise is not related to statistics. I am learning this helpful science recently.