Skype Chat Messages Bug?

LOL
Nah, We are good friends.

Does your Skype not send the messages or doesn't your friend receive the messages? I think your friend should be the worried one, not you.

My Skype not receive the messages instantly.

If you are talking of the same guy which tries to send you messages, then I still think it's not you the one who should worry about it. Assuming it happens with other people too, you should give a good context to let users help you.

Not only him, That happend with many of my clients

Which clients are you talking about?

you probably have to many clients/contacts.

Have the same problem with OP , new contact pop out after 1 hour lol
When signing into skype from another device I realize some of the contact are missing and need to be added manually again .

^ all, skype been having problems, try uninstalling and reinstalling an earlier version