Up until recently (maybe since upgrading to the new TMobile OS?), if I read an email on my phone, or deleted it, it would update nearly instantly on my computer. Now it sometimes takes hours.
Deleting email on my computer will eventually delete on my phone (finally 2-way synch)...that also takes a long time. That's a new feature so that's fine. It's the synch from phone to computer that has changed drastically.