If the triple basket you are using is the
La Marzocco(OR LM Style) Triple basket, which is almost certainly the basket you are using... The stale coffee aside, the basket itself requires a different approach to avoid donut extractions, and just uneven extractions in general.
The only triple basket that is 58mm, that I know of, that you can use almost exactly like a
Traditional or
ridgeless/Synesso double basket, is the
18gram Synesso Triple Basket. If you put the ridgeless 14gram basket, and the ridgeless 18gram basket next to each other, shape wise, they are near identical, and size wise, the 18gram is only slightly taller, but in an E-61 machine, will hold 23-24grams, while the 14gram ridgeless will hold 19-20gr(depending on the coffee). The La Marzocco Triple/Straight Sided 21gram Triple, I had no problem getting 26grams in there, and some coffees I could cram 27gr without touching the screen. Its a BIG basket.
But, whether the coffee is from Intelligentsia or Ecco, or is from Illy or Lavazza, you will get donut extractions, lop-sided extractions, and sprayers all over the place unless you alter your distribution & dosing techniques.
Furthermore,
I think you will find that, while Triples can be fun(if not a PITA), that the double basket, ~16-18gram shots are much more rewarding.
Get some high quality coffee from any number of roasters, use the bottomless portafilter with a double basket, and work on those type of extractions first. Once you have those consistent to where
you are satisfied with your results, then attempt the triple basket if you are still itching to do so.