Let’s say we have transaction X and transaction Y. The timestamp of X is chronologically earlier than that of Y. X’s spender broadcasts X to the network and the same goes for Y’s spender.

Let’s say that miners receive Y first and they add it to the next block, which reaches the max number of stored transactions. Will X be included to the block after this one? Will it be discarded?

If X will be included to the block after this one, isn’t it a problem that it happened before Y?

Thanks in advance for your answers!