I have a septic tank and the tiolet keep blurping when the water is running out of the tub and the two tiolets keep overflowing when you flush them and when you plunger the tiolets it backs up in the tub. I have been living here for five years and the septic tank haven't been cleaned since I been here. The system was backed up six months plummer came and snaked it and now it is doing the same thing.

Hey Boss,
You piggybacked on another thread so I moved you over to your own.
Sounds like you have the same problem. Call a septic tank company and have them check your septic tank to see if it needs to be pumped. Don't let them get away without checking to see if the drain field is working properly.
Good luck, Tom

Well your tank may have failed and/or the field got saturated but I think you have a clog in your drain before it even gets to the tank. Where did the previous plumber get his access to do the rodding 6 months ago, you need to go back there and rod again.