As of today, on a certain server I play on, I lag when I get onto the server. I'm able to break blocks and move, but not able to interact with the world. By this I mean that I won't receive blocks I have broken, I cannot use redstone devices, etc. Nor can I chat (so to speak, anyways). Through dynamap, I was able to figure out that others were able to see my chat, however I was not able to see mine or theirs in-game. Sometimes, minutes later, all the actions I performed (chat, block breaking/placing, world interaction), will all come through at once. This will just happen over and over again until I usually get a "Read time out" error which is odd, since these errors only last for about 2-3 minutes for me, when they occur. (And this has been happening continuously, all day)
NOTE: This only happens for this specific server. All other servers have been acting generally normal, no issues like this. Even the ones that I have ridiculously high ping with (like 2400ms...) are acting normal.
Later, I checked the ping for the server, and it was generally normal, being at its average 240ms or so. I restarted my computer as well, and it still happened. I ran speedtest.net, as well, and received normal results (4.5MPBS upload, 19ishMBPS download).
Is this a problem with my .minecraft? Should I delete it and start fresh? Or is the just a computer/network problem? All help is appreciated.