I am running a t3 .60/.48 turbo, with a tial 38mm EWG, 550 injectors, and mspnp at 12 lbs.

I installed a FM lvl 1 clutch and was very pleased with its near stock pedal feel and the way it held up. After about 3 months the clutch started slipping and was confused as i know im not making near the 318 ft/lbs it is rated to. I started investigating I noticed there was oil on the bottom of the motor, i immediately thought it was the rear main seal. At the same time i knew my turbo was on its way out and was planning to send it out to get rebuilt. I then realized that the gasket between the flange and the CHRA was leaking a pretty significant amount of oil and made a mess everywhere. I decided to take the turbo off during winter break and send it out to get rebuilt and would fix the clutch issue later on. I let the car sit for close to 2 months and when i reinstalled the turbo i decided to put a 5 pound spring in as i was going to run a MBC. After reassembling the turbo i took it for a drive. The clutch does not slip anymore at 5 lbs. I have not installed the MBC yet and have not turned the boost back up.
Is it possible that the oil from the leaking turbo found its way into the bellhousing and caused it to slip?
I would assume that if there was any amount of oil on the clutch it would slip no matter the boost level? I guess the only real way to find out if it is still slipping is to turn the boost back up and see but, the MBC did not come in on time so i couldn't install it while i was home.
Could letting the car sit for 2 months cause the oil to drain out the bell housing and "fix itself"?
I don't really have the time to do a clutch job as i'm a full time student so i would have to send out to get fixed.
Thanks