Clutch plate problem? Nolan Gilliam Audi 4000cs 87

[Nolan Gilliam]

    hi all, 
I accidently spilled oil all over my engine bay.  I cleaned it up but I started to notice that it became difficult to shift into 1st and 2nd gears.  I replaced the slave and master cylnders about a month ago at the same time...  The clutch pedal is returning normally and is not being "sucked" to the floor like it did when the slave and master went bad.  Sometimes I have to make sure that the clutch pedal is completely to the floor and it is still difficult, I have to force the shifter, rather than it smoothly sliding in to 1st and 2nd, Reverse is also sometimes difficult. 3rd 4th and 5th are fine though.  This developed entirely over one day after I spilt oil everywhere....? Suggestions? Thanks.